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Finding the Fourth Proportional to 8,328.60, 11,470.08 and 8,147.16

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Solution

The fourth proportional to 8,328.60, 11,470.08 and 8,147.16 is: 11,220.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,328.60 : 11,470.08 = 8,147.16 : x
  2. Step 2: Convert to fraction form
    8,328.60/11,470.08 = 8,147.16/x
  3. Step 3: Cross multiply
    8,328.60x = 11,470.08 × 8,147.16
  4. Step 4: Simplify right side
    8,328.60x = 93,448,576.97
  5. Step 5: Solve for x
    x = 93,448,576.97/8,328.60
  6. Step 6: Final answer
    x = 11,220.20

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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.