Home / 20,432.39-28,197.18-11,479.64

Finding the Fourth Proportional to 20,432.39, 28,197.18 and 11,479.64

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Solution

The fourth proportional to 20,432.39, 28,197.18 and 11,479.64 is: 15,842.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.39 : 28,197.18 = 11,479.64 : x
  2. Step 2: Convert to fraction form
    20,432.39/28,197.18 = 11,479.64/x
  3. Step 3: Cross multiply
    20,432.39x = 28,197.18 × 11,479.64
  4. Step 4: Simplify right side
    20,432.39x = 323,693,334.43
  5. Step 5: Solve for x
    x = 323,693,334.43/20,432.39
  6. Step 6: Final answer
    x = 15,842.17

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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.