Home / 28,240.78-38,965.40-15,665.52

Finding the Fourth Proportional to 28,240.78, 38,965.40 and 15,665.52

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Solution

The fourth proportional to 28,240.78, 38,965.40 and 15,665.52 is: 21,614.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.78 : 38,965.40 = 15,665.52 : x
  2. Step 2: Convert to fraction form
    28,240.78/38,965.40 = 15,665.52/x
  3. Step 3: Cross multiply
    28,240.78x = 38,965.40 × 15,665.52
  4. Step 4: Simplify right side
    28,240.78x = 610,413,253.01
  5. Step 5: Solve for x
    x = 610,413,253.01/28,240.78
  6. Step 6: Final answer
    x = 21,614.60

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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.