Home / 21,318.18-31,999.45-15,702.20

Finding the Fourth Proportional to 21,318.18, 31,999.45 and 15,702.20

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Solution

The fourth proportional to 21,318.18, 31,999.45 and 15,702.20 is: 23,569.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.18 : 31,999.45 = 15,702.20 : x
  2. Step 2: Convert to fraction form
    21,318.18/31,999.45 = 15,702.20/x
  3. Step 3: Cross multiply
    21,318.18x = 31,999.45 × 15,702.20
  4. Step 4: Simplify right side
    21,318.18x = 502,461,603.79
  5. Step 5: Solve for x
    x = 502,461,603.79/21,318.18
  6. Step 6: Final answer
    x = 23,569.63

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1.5x scale

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.