Home / 15,742.60-21,724.12-8,668.86

Finding the Fourth Proportional to 15,742.60, 21,724.12 and 8,668.86

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Solution

The fourth proportional to 15,742.60, 21,724.12 and 8,668.86 is: 11,962.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.60 : 21,724.12 = 8,668.86 : x
  2. Step 2: Convert to fraction form
    15,742.60/21,724.12 = 8,668.86/x
  3. Step 3: Cross multiply
    15,742.60x = 21,724.12 × 8,668.86
  4. Step 4: Simplify right side
    15,742.60x = 188,323,354.90
  5. Step 5: Solve for x
    x = 188,323,354.90/15,742.60
  6. Step 6: Final answer
    x = 11,962.66

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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.