Home / 21,118.38-31,677.57-9,439.74

Finding the Fourth Proportional to 21,118.38, 31,677.57 and 9,439.74

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Solution

The fourth proportional to 21,118.38, 31,677.57 and 9,439.74 is: 14,159.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.38 : 31,677.57 = 9,439.74 : x
  2. Step 2: Convert to fraction form
    21,118.38/31,677.57 = 9,439.74/x
  3. Step 3: Cross multiply
    21,118.38x = 31,677.57 × 9,439.74
  4. Step 4: Simplify right side
    21,118.38x = 299,028,024.63
  5. Step 5: Solve for x
    x = 299,028,024.63/21,118.38
  6. Step 6: Final answer
    x = 14,159.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.