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Finding the Fourth Proportional to 9,078.40, 13,617.60 and 9,020.80

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Solution

The fourth proportional to 9,078.40, 13,617.60 and 9,020.80 is: 13,531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,078.40 : 13,617.60 = 9,020.80 : x
  2. Step 2: Convert to fraction form
    9,078.40/13,617.60 = 9,020.80/x
  3. Step 3: Cross multiply
    9,078.40x = 13,617.60 × 9,020.80
  4. Step 4: Simplify right side
    9,078.40x = 122,841,646.08
  5. Step 5: Solve for x
    x = 122,841,646.08/9,078.40
  6. Step 6: Final answer
    x = 13,531.20

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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.