Home / 12,909.28-19,350.85-8,749.71

Finding the Fourth Proportional to 12,909.28, 19,350.85 and 8,749.71

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Solution

The fourth proportional to 12,909.28, 19,350.85 and 8,749.71 is: 13,115.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.28 : 19,350.85 = 8,749.71 : x
  2. Step 2: Convert to fraction form
    12,909.28/19,350.85 = 8,749.71/x
  3. Step 3: Cross multiply
    12,909.28x = 19,350.85 × 8,749.71
  4. Step 4: Simplify right side
    12,909.28x = 169,314,325.75
  5. Step 5: Solve for x
    x = 169,314,325.75/12,909.28
  6. Step 6: Final answer
    x = 13,115.71

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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.