Home / 21,254.76-31,871.19-8,772.46

Finding the Fourth Proportional to 21,254.76, 31,871.19 and 8,772.46

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Solution

The fourth proportional to 21,254.76, 31,871.19 and 8,772.46 is: 13,154.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,254.76 : 31,871.19 = 8,772.46 : x
  2. Step 2: Convert to fraction form
    21,254.76/31,871.19 = 8,772.46/x
  3. Step 3: Cross multiply
    21,254.76x = 31,871.19 × 8,772.46
  4. Step 4: Simplify right side
    21,254.76x = 279,588,739.43
  5. Step 5: Solve for x
    x = 279,588,739.43/21,254.76
  6. Step 6: Final answer
    x = 13,154.17

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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.