Home / 21,129.09-31,691.24-5,547.93

Finding the Fourth Proportional to 21,129.09, 31,691.24 and 5,547.93

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Solution

The fourth proportional to 21,129.09, 31,691.24 and 5,547.93 is: 8,321.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.09 : 31,691.24 = 5,547.93 : x
  2. Step 2: Convert to fraction form
    21,129.09/31,691.24 = 5,547.93/x
  3. Step 3: Cross multiply
    21,129.09x = 31,691.24 × 5,547.93
  4. Step 4: Simplify right side
    21,129.09x = 175,820,753.39
  5. Step 5: Solve for x
    x = 175,820,753.39/21,129.09
  6. Step 6: Final answer
    x = 8,321.26

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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.