Home / 20,747.56-31,110.30-8,261.16

Finding the Fourth Proportional to 20,747.56, 31,110.30 and 8,261.16

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Solution

The fourth proportional to 20,747.56, 31,110.30 and 8,261.16 is: 12,387.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.56 : 31,110.30 = 8,261.16 : x
  2. Step 2: Convert to fraction form
    20,747.56/31,110.30 = 8,261.16/x
  3. Step 3: Cross multiply
    20,747.56x = 31,110.30 × 8,261.16
  4. Step 4: Simplify right side
    20,747.56x = 257,007,165.95
  5. Step 5: Solve for x
    x = 257,007,165.95/20,747.56
  6. Step 6: Final answer
    x = 12,387.34

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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.