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Finding the Fourth Proportional to 14,869.55, 20,519.92 and 8,155.01

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Solution

The fourth proportional to 14,869.55, 20,519.92 and 8,155.01 is: 11,253.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,869.55 : 20,519.92 = 8,155.01 : x
  2. Step 2: Convert to fraction form
    14,869.55/20,519.92 = 8,155.01/x
  3. Step 3: Cross multiply
    14,869.55x = 20,519.92 × 8,155.01
  4. Step 4: Simplify right side
    14,869.55x = 167,340,152.80
  5. Step 5: Solve for x
    x = 167,340,152.80/14,869.55
  6. Step 6: Final answer
    x = 11,253.88

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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.