Home / 21,184.80-31,755.02-7,139.96

Finding the Fourth Proportional to 21,184.80, 31,755.02 and 7,139.96

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Solution

The fourth proportional to 21,184.80, 31,755.02 and 7,139.96 is: 10,702.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,184.80 : 31,755.02 = 7,139.96 : x
  2. Step 2: Convert to fraction form
    21,184.80/31,755.02 = 7,139.96/x
  3. Step 3: Cross multiply
    21,184.80x = 31,755.02 × 7,139.96
  4. Step 4: Simplify right side
    21,184.80x = 226,729,572.60
  5. Step 5: Solve for x
    x = 226,729,572.60/21,184.80
  6. Step 6: Final answer
    x = 10,702.46

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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.