Home / 21,217.28-29,280.40-11,786.72

Finding the Fourth Proportional to 21,217.28, 29,280.40 and 11,786.72

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Solution

The fourth proportional to 21,217.28, 29,280.40 and 11,786.72 is: 16,265.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.28 : 29,280.40 = 11,786.72 : x
  2. Step 2: Convert to fraction form
    21,217.28/29,280.40 = 11,786.72/x
  3. Step 3: Cross multiply
    21,217.28x = 29,280.40 × 11,786.72
  4. Step 4: Simplify right side
    21,217.28x = 345,119,876.29
  5. Step 5: Solve for x
    x = 345,119,876.29/21,217.28
  6. Step 6: Final answer
    x = 16,265.98

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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.