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Finding the Fourth Proportional to 15,149.79, 20,909.61 and 9,184.71

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Solution

The fourth proportional to 15,149.79, 20,909.61 and 9,184.71 is: 12,676.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,149.79 : 20,909.61 = 9,184.71 : x
  2. Step 2: Convert to fraction form
    15,149.79/20,909.61 = 9,184.71/x
  3. Step 3: Cross multiply
    15,149.79x = 20,909.61 × 9,184.71
  4. Step 4: Simplify right side
    15,149.79x = 192,048,704.06
  5. Step 5: Solve for x
    x = 192,048,704.06/15,149.79
  6. Step 6: Final answer
    x = 12,676.66

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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.