Home / 21,017.88-31,517.64-11,154.78

Finding the Fourth Proportional to 21,017.88, 31,517.64 and 11,154.78

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Solution

The fourth proportional to 21,017.88, 31,517.64 and 11,154.78 is: 16,727.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.88 : 31,517.64 = 11,154.78 : x
  2. Step 2: Convert to fraction form
    21,017.88/31,517.64 = 11,154.78/x
  3. Step 3: Cross multiply
    21,017.88x = 31,517.64 × 11,154.78
  4. Step 4: Simplify right side
    21,017.88x = 351,572,340.32
  5. Step 5: Solve for x
    x = 351,572,340.32/21,017.88
  6. Step 6: Final answer
    x = 16,727.30

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1.5x scale

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.