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Finding the Fourth Proportional to 15,117.10, 20,853.08 and 9,065.73

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Solution

The fourth proportional to 15,117.10, 20,853.08 and 9,065.73 is: 12,505.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.10 : 20,853.08 = 9,065.73 : x
  2. Step 2: Convert to fraction form
    15,117.10/20,853.08 = 9,065.73/x
  3. Step 3: Cross multiply
    15,117.10x = 20,853.08 × 9,065.73
  4. Step 4: Simplify right side
    15,117.10x = 189,048,363.48
  5. Step 5: Solve for x
    x = 189,048,363.48/15,117.10
  6. Step 6: Final answer
    x = 12,505.60

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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.