Home / 12,956.28-17,880.12-8,240.46

Finding the Fourth Proportional to 12,956.28, 17,880.12 and 8,240.46

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Solution

The fourth proportional to 12,956.28, 17,880.12 and 8,240.46 is: 11,372.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,956.28 : 17,880.12 = 8,240.46 : x
  2. Step 2: Convert to fraction form
    12,956.28/17,880.12 = 8,240.46/x
  3. Step 3: Cross multiply
    12,956.28x = 17,880.12 × 8,240.46
  4. Step 4: Simplify right side
    12,956.28x = 147,340,413.66
  5. Step 5: Solve for x
    x = 147,340,413.66/12,956.28
  6. Step 6: Final answer
    x = 11,372.12

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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.