Home / 15,489.98-21,374.34-9,115.17

Finding the Fourth Proportional to 15,489.98, 21,374.34 and 9,115.17

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Solution

The fourth proportional to 15,489.98, 21,374.34 and 9,115.17 is: 12,577.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.98 : 21,374.34 = 9,115.17 : x
  2. Step 2: Convert to fraction form
    15,489.98/21,374.34 = 9,115.17/x
  3. Step 3: Cross multiply
    15,489.98x = 21,374.34 × 9,115.17
  4. Step 4: Simplify right side
    15,489.98x = 194,830,742.74
  5. Step 5: Solve for x
    x = 194,830,742.74/15,489.98
  6. Step 6: Final answer
    x = 12,577.86

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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.