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Finding the Fourth Proportional to 6,885.62, 9,499.10 and 4,089.50

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Solution

The fourth proportional to 6,885.62, 9,499.10 and 4,089.50 is: 5,641.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,885.62 : 9,499.10 = 4,089.50 : x
  2. Step 2: Convert to fraction form
    6,885.62/9,499.10 = 4,089.50/x
  3. Step 3: Cross multiply
    6,885.62x = 9,499.10 × 4,089.50
  4. Step 4: Simplify right side
    6,885.62x = 38,846,569.45
  5. Step 5: Solve for x
    x = 38,846,569.45/6,885.62
  6. Step 6: Final answer
    x = 5,641.70

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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.