Home / 15,854.74-21,874.53-9,139.42

Finding the Fourth Proportional to 15,854.74, 21,874.53 and 9,139.42

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Solution

The fourth proportional to 15,854.74, 21,874.53 and 9,139.42 is: 12,609.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,854.74 : 21,874.53 = 9,139.42 : x
  2. Step 2: Convert to fraction form
    15,854.74/21,874.53 = 9,139.42/x
  3. Step 3: Cross multiply
    15,854.74x = 21,874.53 × 9,139.42
  4. Step 4: Simplify right side
    15,854.74x = 199,920,516.97
  5. Step 5: Solve for x
    x = 199,920,516.97/15,854.74
  6. Step 6: Final answer
    x = 12,609.51

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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.