Home / 28,240.38-38,973-15,665.14

Finding the Fourth Proportional to 28,240.38, 38,973 and 15,665.14

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Solution

The fourth proportional to 28,240.38, 38,973 and 15,665.14 is: 21,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.38 : 38,973 = 15,665.14 : x
  2. Step 2: Convert to fraction form
    28,240.38/38,973 = 15,665.14/x
  3. Step 3: Cross multiply
    28,240.38x = 38,973 × 15,665.14
  4. Step 4: Simplify right side
    28,240.38x = 610,517,501.22
  5. Step 5: Solve for x
    x = 610,517,501.22/28,240.38
  6. Step 6: Final answer
    x = 21,618.60

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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.