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Finding the Fourth Proportional to 8,928.16, 13,400.94 and 7,456.80

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Solution

The fourth proportional to 8,928.16, 13,400.94 and 7,456.80 is: 11,192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.16 : 13,400.94 = 7,456.80 : x
  2. Step 2: Convert to fraction form
    8,928.16/13,400.94 = 7,456.80/x
  3. Step 3: Cross multiply
    8,928.16x = 13,400.94 × 7,456.80
  4. Step 4: Simplify right side
    8,928.16x = 99,928,129.39
  5. Step 5: Solve for x
    x = 99,928,129.39/8,928.16
  6. Step 6: Final answer
    x = 11,192.47

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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.