Home / 21,153.48-31,731.78-5,571

Finding the Fourth Proportional to 21,153.48, 31,731.78 and 5,571

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Solution

The fourth proportional to 21,153.48, 31,731.78 and 5,571 is: 8,356.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.48 : 31,731.78 = 5,571 : x
  2. Step 2: Convert to fraction form
    21,153.48/31,731.78 = 5,571/x
  3. Step 3: Cross multiply
    21,153.48x = 31,731.78 × 5,571
  4. Step 4: Simplify right side
    21,153.48x = 176,777,746.38
  5. Step 5: Solve for x
    x = 176,777,746.38/21,153.48
  6. Step 6: Final answer
    x = 8,356.91

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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.