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Finding the Fourth Proportional to 9,377.88, 12,928.11 and 6,389.88

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Solution

The fourth proportional to 9,377.88, 12,928.11 and 6,389.88 is: 8,808.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,377.88 : 12,928.11 = 6,389.88 : x
  2. Step 2: Convert to fraction form
    9,377.88/12,928.11 = 6,389.88/x
  3. Step 3: Cross multiply
    9,377.88x = 12,928.11 × 6,389.88
  4. Step 4: Simplify right side
    9,377.88x = 82,609,071.53
  5. Step 5: Solve for x
    x = 82,609,071.53/9,377.88
  6. Step 6: Final answer
    x = 8,808.93

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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.