Home / 28,167.47-38,871.11-15,420.61

Finding the Fourth Proportional to 28,167.47, 38,871.11 and 15,420.61

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Solution

The fourth proportional to 28,167.47, 38,871.11 and 15,420.61 is: 21,280.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,167.47 : 38,871.11 = 15,420.61 : x
  2. Step 2: Convert to fraction form
    28,167.47/38,871.11 = 15,420.61/x
  3. Step 3: Cross multiply
    28,167.47x = 38,871.11 × 15,420.61
  4. Step 4: Simplify right side
    28,167.47x = 599,416,227.98
  5. Step 5: Solve for x
    x = 599,416,227.98/28,167.47
  6. Step 6: Final answer
    x = 21,280.44

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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.