Home / 13,438.60-18,545.32-7,470.36

Finding the Fourth Proportional to 13,438.60, 18,545.32 and 7,470.36

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Solution

The fourth proportional to 13,438.60, 18,545.32 and 7,470.36 is: 10,309.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.60 : 18,545.32 = 7,470.36 : x
  2. Step 2: Convert to fraction form
    13,438.60/18,545.32 = 7,470.36/x
  3. Step 3: Cross multiply
    13,438.60x = 18,545.32 × 7,470.36
  4. Step 4: Simplify right side
    13,438.60x = 138,540,216.72
  5. Step 5: Solve for x
    x = 138,540,216.72/13,438.60
  6. Step 6: Final answer
    x = 10,309.13

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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.