Home / 30,688.12-42,358.44-18,116.92

Finding the Fourth Proportional to 30,688.12, 42,358.44 and 18,116.92

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Solution

The fourth proportional to 30,688.12, 42,358.44 and 18,116.92 is: 25,006.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,688.12 : 42,358.44 = 18,116.92 : x
  2. Step 2: Convert to fraction form
    30,688.12/42,358.44 = 18,116.92/x
  3. Step 3: Cross multiply
    30,688.12x = 42,358.44 × 18,116.92
  4. Step 4: Simplify right side
    30,688.12x = 767,404,468.80
  5. Step 5: Solve for x
    x = 767,404,468.80/30,688.12
  6. Step 6: Final answer
    x = 25,006.57

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Double scale
Find fourth proportional to 30,689.12, 42,359.82 and 18,117.92
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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.