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Finding the Fourth Proportional to 18,840.75, 28,261.13 and 7,753.47

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Solution

The fourth proportional to 18,840.75, 28,261.13 and 7,753.47 is: 11,630.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,840.75 : 28,261.13 = 7,753.47 : x
  2. Step 2: Convert to fraction form
    18,840.75/28,261.13 = 7,753.47/x
  3. Step 3: Cross multiply
    18,840.75x = 28,261.13 × 7,753.47
  4. Step 4: Simplify right side
    18,840.75x = 219,121,784.85
  5. Step 5: Solve for x
    x = 219,121,784.85/18,840.75
  6. Step 6: Final answer
    x = 11,630.21

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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.