Home / 21,686.28-29,926.28-12,254.64

Finding the Fourth Proportional to 21,686.28, 29,926.28 and 12,254.64

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Solution

The fourth proportional to 21,686.28, 29,926.28 and 12,254.64 is: 16,910.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,686.28 : 29,926.28 = 12,254.64 : x
  2. Step 2: Convert to fraction form
    21,686.28/29,926.28 = 12,254.64/x
  3. Step 3: Cross multiply
    21,686.28x = 29,926.28 × 12,254.64
  4. Step 4: Simplify right side
    21,686.28x = 366,735,787.94
  5. Step 5: Solve for x
    x = 366,735,787.94/21,686.28
  6. Step 6: Final answer
    x = 16,910.96

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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.