Home / 28,487.63-39,313.05-15,912.38

Finding the Fourth Proportional to 28,487.63, 39,313.05 and 15,912.38

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Solution

The fourth proportional to 28,487.63, 39,313.05 and 15,912.38 is: 21,959.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.63 : 39,313.05 = 15,912.38 : x
  2. Step 2: Convert to fraction form
    28,487.63/39,313.05 = 15,912.38/x
  3. Step 3: Cross multiply
    28,487.63x = 39,313.05 × 15,912.38
  4. Step 4: Simplify right side
    28,487.63x = 625,564,229.17
  5. Step 5: Solve for x
    x = 625,564,229.17/28,487.63
  6. Step 6: Final answer
    x = 21,959.15

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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.