Home / 21,218.76-29,281.08-11,787.92

Finding the Fourth Proportional to 21,218.76, 29,281.08 and 11,787.92

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Solution

The fourth proportional to 21,218.76, 29,281.08 and 11,787.92 is: 16,266.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.76 : 29,281.08 = 11,787.92 : x
  2. Step 2: Convert to fraction form
    21,218.76/29,281.08 = 11,787.92/x
  3. Step 3: Cross multiply
    21,218.76x = 29,281.08 × 11,787.92
  4. Step 4: Simplify right side
    21,218.76x = 345,163,028.55
  5. Step 5: Solve for x
    x = 345,163,028.55/21,218.76
  6. Step 6: Final answer
    x = 16,266.88

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1.5x scale

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.