Home / 21,387.84-29,515.20-11,956.56

Finding the Fourth Proportional to 21,387.84, 29,515.20 and 11,956.56

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Solution

The fourth proportional to 21,387.84, 29,515.20 and 11,956.56 is: 16,500.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.84 : 29,515.20 = 11,956.56 : x
  2. Step 2: Convert to fraction form
    21,387.84/29,515.20 = 11,956.56/x
  3. Step 3: Cross multiply
    21,387.84x = 29,515.20 × 11,956.56
  4. Step 4: Simplify right side
    21,387.84x = 352,900,259.71
  5. Step 5: Solve for x
    x = 352,900,259.71/21,387.84
  6. Step 6: Final answer
    x = 16,500.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.