Home / 28,715.67-39,631.19-16,140.42

Finding the Fourth Proportional to 28,715.67, 39,631.19 and 16,140.42

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Solution

The fourth proportional to 28,715.67, 39,631.19 and 16,140.42 is: 22,275.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.67 : 39,631.19 = 16,140.42 : x
  2. Step 2: Convert to fraction form
    28,715.67/39,631.19 = 16,140.42/x
  3. Step 3: Cross multiply
    28,715.67x = 39,631.19 × 16,140.42
  4. Step 4: Simplify right side
    28,715.67x = 639,663,971.00
  5. Step 5: Solve for x
    x = 639,663,971.00/28,715.67
  6. Step 6: Final answer
    x = 22,275.78

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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.