Home / 13,439.15-18,545.21-7,470.60

Finding the Fourth Proportional to 13,439.15, 18,545.21 and 7,470.60

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Solution

The fourth proportional to 13,439.15, 18,545.21 and 7,470.60 is: 10,308.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.15 : 18,545.21 = 7,470.60 : x
  2. Step 2: Convert to fraction form
    13,439.15/18,545.21 = 7,470.60/x
  3. Step 3: Cross multiply
    13,439.15x = 18,545.21 × 7,470.60
  4. Step 4: Simplify right side
    13,439.15x = 138,543,808.47
  5. Step 5: Solve for x
    x = 138,543,808.47/13,439.15
  6. Step 6: Final answer
    x = 10,308.97

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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.