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Finding the Fourth Proportional to 10,108.80, 15,148.80 and 7,455.60

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Solution

The fourth proportional to 10,108.80, 15,148.80 and 7,455.60 is: 11,172.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,108.80 : 15,148.80 = 7,455.60 : x
  2. Step 2: Convert to fraction form
    10,108.80/15,148.80 = 7,455.60/x
  3. Step 3: Cross multiply
    10,108.80x = 15,148.80 × 7,455.60
  4. Step 4: Simplify right side
    10,108.80x = 112,943,393.28
  5. Step 5: Solve for x
    x = 112,943,393.28/10,108.80
  6. Step 6: Final answer
    x = 11,172.78

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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.