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Finding the Fourth Proportional to 14,859.20, 20,505.65 and 8,145.11

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Solution

The fourth proportional to 14,859.20, 20,505.65 and 8,145.11 is: 11,240.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,859.20 : 20,505.65 = 8,145.11 : x
  2. Step 2: Convert to fraction form
    14,859.20/20,505.65 = 8,145.11/x
  3. Step 3: Cross multiply
    14,859.20x = 20,505.65 × 8,145.11
  4. Step 4: Simplify right side
    14,859.20x = 167,020,631.62
  5. Step 5: Solve for x
    x = 167,020,631.62/14,859.20
  6. Step 6: Final answer
    x = 11,240.22

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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.