Home / 15,687.13-21,646.83-8,613.40

Finding the Fourth Proportional to 15,687.13, 21,646.83 and 8,613.40

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Solution

The fourth proportional to 15,687.13, 21,646.83 and 8,613.40 is: 11,885.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.13 : 21,646.83 = 8,613.40 : x
  2. Step 2: Convert to fraction form
    15,687.13/21,646.83 = 8,613.40/x
  3. Step 3: Cross multiply
    15,687.13x = 21,646.83 × 8,613.40
  4. Step 4: Simplify right side
    15,687.13x = 186,452,805.52
  5. Step 5: Solve for x
    x = 186,452,805.52/15,687.13
  6. Step 6: Final answer
    x = 11,885.72

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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.