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Finding the Fourth Proportional to 9,955.28, 14,984.78 and 8,451.92

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Solution

The fourth proportional to 9,955.28, 14,984.78 and 8,451.92 is: 12,721.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,955.28 : 14,984.78 = 8,451.92 : x
  2. Step 2: Convert to fraction form
    9,955.28/14,984.78 = 8,451.92/x
  3. Step 3: Cross multiply
    9,955.28x = 14,984.78 × 8,451.92
  4. Step 4: Simplify right side
    9,955.28x = 126,650,161.78
  5. Step 5: Solve for x
    x = 126,650,161.78/9,955.28
  6. Step 6: Final answer
    x = 12,721.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.