Home / 20,963.71-31,460.15-13,549.78

Finding the Fourth Proportional to 20,963.71, 31,460.15 and 13,549.78

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Solution

The fourth proportional to 20,963.71, 31,460.15 and 13,549.78 is: 20,334.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.71 : 31,460.15 = 13,549.78 : x
  2. Step 2: Convert to fraction form
    20,963.71/31,460.15 = 13,549.78/x
  3. Step 3: Cross multiply
    20,963.71x = 31,460.15 × 13,549.78
  4. Step 4: Simplify right side
    20,963.71x = 426,278,108.25
  5. Step 5: Solve for x
    x = 426,278,108.25/20,963.71
  6. Step 6: Final answer
    x = 20,334.10

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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.