Home / 8,631.45-11,915.42-6,507.84

Finding the Fourth Proportional to 8,631.45, 11,915.42 and 6,507.84

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Solution

The fourth proportional to 8,631.45, 11,915.42 and 6,507.84 is: 8,983.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.45 : 11,915.42 = 6,507.84 : x
  2. Step 2: Convert to fraction form
    8,631.45/11,915.42 = 6,507.84/x
  3. Step 3: Cross multiply
    8,631.45x = 11,915.42 × 6,507.84
  4. Step 4: Simplify right side
    8,631.45x = 77,543,646.89
  5. Step 5: Solve for x
    x = 77,543,646.89/8,631.45
  6. Step 6: Final answer
    x = 8,983.85

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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.