Home / 21,115.06-31,663.46-8,627.28

Finding the Fourth Proportional to 21,115.06, 31,663.46 and 8,627.28

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Solution

The fourth proportional to 21,115.06, 31,663.46 and 8,627.28 is: 12,937.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.06 : 31,663.46 = 8,627.28 : x
  2. Step 2: Convert to fraction form
    21,115.06/31,663.46 = 8,627.28/x
  3. Step 3: Cross multiply
    21,115.06x = 31,663.46 × 8,627.28
  4. Step 4: Simplify right side
    21,115.06x = 273,169,535.19
  5. Step 5: Solve for x
    x = 273,169,535.19/21,115.06
  6. Step 6: Final answer
    x = 12,937.19

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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.