Home / 13,439.14-20,158.65-5,117.20

Finding the Fourth Proportional to 13,439.14, 20,158.65 and 5,117.20

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Solution

The fourth proportional to 13,439.14, 20,158.65 and 5,117.20 is: 7,675.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.14 : 20,158.65 = 5,117.20 : x
  2. Step 2: Convert to fraction form
    13,439.14/20,158.65 = 5,117.20/x
  3. Step 3: Cross multiply
    13,439.14x = 20,158.65 × 5,117.20
  4. Step 4: Simplify right side
    13,439.14x = 103,155,843.78
  5. Step 5: Solve for x
    x = 103,155,843.78/13,439.14
  6. Step 6: Final answer
    x = 7,675.78

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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.