Home / 21,334.57-31,988.15-8,863.21

Finding the Fourth Proportional to 21,334.57, 31,988.15 and 8,863.21

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Solution

The fourth proportional to 21,334.57, 31,988.15 and 8,863.21 is: 13,289.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,334.57 : 31,988.15 = 8,863.21 : x
  2. Step 2: Convert to fraction form
    21,334.57/31,988.15 = 8,863.21/x
  3. Step 3: Cross multiply
    21,334.57x = 31,988.15 × 8,863.21
  4. Step 4: Simplify right side
    21,334.57x = 283,517,486.70
  5. Step 5: Solve for x
    x = 283,517,486.70/21,334.57
  6. Step 6: Final answer
    x = 13,289.11

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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.