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Finding the Fourth Proportional to 15,187.60, 20,953.04 and 9,217.12

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Solution

The fourth proportional to 15,187.60, 20,953.04 and 9,217.12 is: 12,716.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,187.60 : 20,953.04 = 9,217.12 : x
  2. Step 2: Convert to fraction form
    15,187.60/20,953.04 = 9,217.12/x
  3. Step 3: Cross multiply
    15,187.60x = 20,953.04 × 9,217.12
  4. Step 4: Simplify right side
    15,187.60x = 193,126,684.04
  5. Step 5: Solve for x
    x = 193,126,684.04/15,187.60
  6. Step 6: Final answer
    x = 12,716.08

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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.