Home / 28,432.89-39,237.27-15,686.88

Finding the Fourth Proportional to 28,432.89, 39,237.27 and 15,686.88

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Solution

The fourth proportional to 28,432.89, 39,237.27 and 15,686.88 is: 21,647.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,432.89 : 39,237.27 = 15,686.88 : x
  2. Step 2: Convert to fraction form
    28,432.89/39,237.27 = 15,686.88/x
  3. Step 3: Cross multiply
    28,432.89x = 39,237.27 × 15,686.88
  4. Step 4: Simplify right side
    28,432.89x = 615,510,071.40
  5. Step 5: Solve for x
    x = 615,510,071.40/28,432.89
  6. Step 6: Final answer
    x = 21,647.82

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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.