Home / 15,854.31-21,853.76-12,491.91

Finding the Fourth Proportional to 15,854.31, 21,853.76 and 12,491.91

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Solution

The fourth proportional to 15,854.31, 21,853.76 and 12,491.91 is: 17,218.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,854.31 : 21,853.76 = 12,491.91 : x
  2. Step 2: Convert to fraction form
    15,854.31/21,853.76 = 12,491.91/x
  3. Step 3: Cross multiply
    15,854.31x = 21,853.76 × 12,491.91
  4. Step 4: Simplify right side
    15,854.31x = 272,995,140.62
  5. Step 5: Solve for x
    x = 272,995,140.62/15,854.31
  6. Step 6: Final answer
    x = 17,218.99

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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.