Home / 9,942.30-13,721.68-6,415.78

Finding the Fourth Proportional to 9,942.30, 13,721.68 and 6,415.78

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Solution

The fourth proportional to 9,942.30, 13,721.68 and 6,415.78 is: 8,854.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,942.30 : 13,721.68 = 6,415.78 : x
  2. Step 2: Convert to fraction form
    9,942.30/13,721.68 = 6,415.78/x
  3. Step 3: Cross multiply
    9,942.30x = 13,721.68 × 6,415.78
  4. Step 4: Simplify right side
    9,942.30x = 88,035,280.11
  5. Step 5: Solve for x
    x = 88,035,280.11/9,942.30
  6. Step 6: Final answer
    x = 8,854.62

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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.