Home / 21,731.49-29,988.02-12,169.71

Finding the Fourth Proportional to 21,731.49, 29,988.02 and 12,169.71

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Solution

The fourth proportional to 21,731.49, 29,988.02 and 12,169.71 is: 16,793.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.49 : 29,988.02 = 12,169.71 : x
  2. Step 2: Convert to fraction form
    21,731.49/29,988.02 = 12,169.71/x
  3. Step 3: Cross multiply
    21,731.49x = 29,988.02 × 12,169.71
  4. Step 4: Simplify right side
    21,731.49x = 364,945,537.30
  5. Step 5: Solve for x
    x = 364,945,537.30/21,731.49
  6. Step 6: Final answer
    x = 16,793.40

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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.