Home / 31,418.18-47,130.70-13,636.61

Finding the Fourth Proportional to 31,418.18, 47,130.70 and 13,636.61

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Solution

The fourth proportional to 31,418.18, 47,130.70 and 13,636.61 is: 20,456.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,418.18 : 47,130.70 = 13,636.61 : x
  2. Step 2: Convert to fraction form
    31,418.18/47,130.70 = 13,636.61/x
  3. Step 3: Cross multiply
    31,418.18x = 47,130.70 × 13,636.61
  4. Step 4: Simplify right side
    31,418.18x = 642,702,974.93
  5. Step 5: Solve for x
    x = 642,702,974.93/31,418.18
  6. Step 6: Final answer
    x = 20,456.40

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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.