Home / 31,749.20-47,640-13,043.60

Finding the Fourth Proportional to 31,749.20, 47,640 and 13,043.60

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Solution

The fourth proportional to 31,749.20, 47,640 and 13,043.60 is: 19,572.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,749.20 : 47,640 = 13,043.60 : x
  2. Step 2: Convert to fraction form
    31,749.20/47,640 = 13,043.60/x
  3. Step 3: Cross multiply
    31,749.20x = 47,640 × 13,043.60
  4. Step 4: Simplify right side
    31,749.20x = 621,397,104
  5. Step 5: Solve for x
    x = 621,397,104/31,749.20
  6. Step 6: Final answer
    x = 19,572.06

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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.