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Finding the Fourth Proportional to 8,969.78, 13,449.59 and 4,290.92

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Solution

The fourth proportional to 8,969.78, 13,449.59 and 4,290.92 is: 6,433.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969.78 : 13,449.59 = 4,290.92 : x
  2. Step 2: Convert to fraction form
    8,969.78/13,449.59 = 4,290.92/x
  3. Step 3: Cross multiply
    8,969.78x = 13,449.59 × 4,290.92
  4. Step 4: Simplify right side
    8,969.78x = 57,711,047.47
  5. Step 5: Solve for x
    x = 57,711,047.47/8,969.78
  6. Step 6: Final answer
    x = 6,433.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.