Home / 20,702.20-31,053.30-13,703.80

Finding the Fourth Proportional to 20,702.20, 31,053.30 and 13,703.80

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Solution

The fourth proportional to 20,702.20, 31,053.30 and 13,703.80 is: 20,555.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.20 : 31,053.30 = 13,703.80 : x
  2. Step 2: Convert to fraction form
    20,702.20/31,053.30 = 13,703.80/x
  3. Step 3: Cross multiply
    20,702.20x = 31,053.30 × 13,703.80
  4. Step 4: Simplify right side
    20,702.20x = 425,548,212.54
  5. Step 5: Solve for x
    x = 425,548,212.54/20,702.20
  6. Step 6: Final answer
    x = 20,555.70

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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.