Home / 13,710.23-18,920.11-7,422.61

Finding the Fourth Proportional to 13,710.23, 18,920.11 and 7,422.61

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Solution

The fourth proportional to 13,710.23, 18,920.11 and 7,422.61 is: 10,243.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.23 : 18,920.11 = 7,422.61 : x
  2. Step 2: Convert to fraction form
    13,710.23/18,920.11 = 7,422.61/x
  3. Step 3: Cross multiply
    13,710.23x = 18,920.11 × 7,422.61
  4. Step 4: Simplify right side
    13,710.23x = 140,436,465.97
  5. Step 5: Solve for x
    x = 140,436,465.97/13,710.23
  6. Step 6: Final answer
    x = 10,243.19

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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.