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Finding the Fourth Proportional to 30,967.67, 42,721.67 and 18,385.13

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Solution

The fourth proportional to 30,967.67, 42,721.67 and 18,385.13 is: 25,363.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,967.67 : 42,721.67 = 18,385.13 : x
  2. Step 2: Convert to fraction form
    30,967.67/42,721.67 = 18,385.13/x
  3. Step 3: Cross multiply
    30,967.67x = 42,721.67 × 18,385.13
  4. Step 4: Simplify right side
    30,967.67x = 785,443,151.23
  5. Step 5: Solve for x
    x = 785,443,151.23/30,967.67
  6. Step 6: Final answer
    x = 25,363.33

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Half scale
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Double scale
Find fourth proportional to 30,968.67, 42,723.04 and 18,386.13
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.