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Finding the Fourth Proportional to 6,872.88, 9,487.80 and 4,390.32

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Solution

The fourth proportional to 6,872.88, 9,487.80 and 4,390.32 is: 6,060.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,872.88 : 9,487.80 = 4,390.32 : x
  2. Step 2: Convert to fraction form
    6,872.88/9,487.80 = 4,390.32/x
  3. Step 3: Cross multiply
    6,872.88x = 9,487.80 × 4,390.32
  4. Step 4: Simplify right side
    6,872.88x = 41,654,478.10
  5. Step 5: Solve for x
    x = 41,654,478.10/6,872.88
  6. Step 6: Final answer
    x = 6,060.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.