Home / 30,623.67-42,271.20-19,312.20

Finding the Fourth Proportional to 30,623.67, 42,271.20 and 19,312.20

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Solution

The fourth proportional to 30,623.67, 42,271.20 and 19,312.20 is: 26,657.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,623.67 : 42,271.20 = 19,312.20 : x
  2. Step 2: Convert to fraction form
    30,623.67/42,271.20 = 19,312.20/x
  3. Step 3: Cross multiply
    30,623.67x = 42,271.20 × 19,312.20
  4. Step 4: Simplify right side
    30,623.67x = 816,349,868.64
  5. Step 5: Solve for x
    x = 816,349,868.64/30,623.67
  6. Step 6: Final answer
    x = 26,657.48

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Half scale
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Double scale
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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.