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Finding the Fourth Proportional to 10,459.80, 15,711.57 and 8,819.55

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Solution

The fourth proportional to 10,459.80, 15,711.57 and 8,819.55 is: 13,247.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,459.80 : 15,711.57 = 8,819.55 : x
  2. Step 2: Convert to fraction form
    10,459.80/15,711.57 = 8,819.55/x
  3. Step 3: Cross multiply
    10,459.80x = 15,711.57 × 8,819.55
  4. Step 4: Simplify right side
    10,459.80x = 138,568,977.19
  5. Step 5: Solve for x
    x = 138,568,977.19/10,459.80
  6. Step 6: Final answer
    x = 13,247.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.