Home / 12,909.28-19,350.84-8,749.72

Finding the Fourth Proportional to 12,909.28, 19,350.84 and 8,749.72

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Solution

The fourth proportional to 12,909.28, 19,350.84 and 8,749.72 is: 13,115.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.28 : 19,350.84 = 8,749.72 : x
  2. Step 2: Convert to fraction form
    12,909.28/19,350.84 = 8,749.72/x
  3. Step 3: Cross multiply
    12,909.28x = 19,350.84 × 8,749.72
  4. Step 4: Simplify right side
    12,909.28x = 169,314,431.76
  5. Step 5: Solve for x
    x = 169,314,431.76/12,909.28
  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.