Home / 31,402.86-47,077.81-13,620.13

Finding the Fourth Proportional to 31,402.86, 47,077.81 and 13,620.13

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Solution

The fourth proportional to 31,402.86, 47,077.81 and 13,620.13 is: 20,418.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,402.86 : 47,077.81 = 13,620.13 : x
  2. Step 2: Convert to fraction form
    31,402.86/47,077.81 = 13,620.13/x
  3. Step 3: Cross multiply
    31,402.86x = 47,077.81 × 13,620.13
  4. Step 4: Simplify right side
    31,402.86x = 641,206,091.57
  5. Step 5: Solve for x
    x = 641,206,091.57/31,402.86
  6. Step 6: Final answer
    x = 20,418.72

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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.