Home / 21,641.04-29,872.08-12,691.44

Finding the Fourth Proportional to 21,641.04, 29,872.08 and 12,691.44

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Solution

The fourth proportional to 21,641.04, 29,872.08 and 12,691.44 is: 17,518.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.04 : 29,872.08 = 12,691.44 : x
  2. Step 2: Convert to fraction form
    21,641.04/29,872.08 = 12,691.44/x
  3. Step 3: Cross multiply
    21,641.04x = 29,872.08 × 12,691.44
  4. Step 4: Simplify right side
    21,641.04x = 379,119,711.00
  5. Step 5: Solve for x
    x = 379,119,711.00/21,641.04
  6. Step 6: Final answer
    x = 17,518.55

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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.