Home / 31,478.08-47,235.36-11,755.90

Finding the Fourth Proportional to 31,478.08, 47,235.36 and 11,755.90

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Solution

The fourth proportional to 31,478.08, 47,235.36 and 11,755.90 is: 17,640.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,478.08 : 47,235.36 = 11,755.90 : x
  2. Step 2: Convert to fraction form
    31,478.08/47,235.36 = 11,755.90/x
  3. Step 3: Cross multiply
    31,478.08x = 47,235.36 × 11,755.90
  4. Step 4: Simplify right side
    31,478.08x = 555,294,168.62
  5. Step 5: Solve for x
    x = 555,294,168.62/31,478.08
  6. Step 6: Final answer
    x = 17,640.66

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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.