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Finding the Fourth Proportional to 15,079.47, 20,808.95 and 8,364.57

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Solution

The fourth proportional to 15,079.47, 20,808.95 and 8,364.57 is: 11,542.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,079.47 : 20,808.95 = 8,364.57 : x
  2. Step 2: Convert to fraction form
    15,079.47/20,808.95 = 8,364.57/x
  3. Step 3: Cross multiply
    15,079.47x = 20,808.95 × 8,364.57
  4. Step 4: Simplify right side
    15,079.47x = 174,057,877.08
  5. Step 5: Solve for x
    x = 174,057,877.08/15,079.47
  6. Step 6: Final answer
    x = 11,542.71

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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.