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Finding the Fourth Proportional to 10,404.80, 15,548.38 and 7,488.80

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Solution

The fourth proportional to 10,404.80, 15,548.38 and 7,488.80 is: 11,190.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,404.80 : 15,548.38 = 7,488.80 : x
  2. Step 2: Convert to fraction form
    10,404.80/15,548.38 = 7,488.80/x
  3. Step 3: Cross multiply
    10,404.80x = 15,548.38 × 7,488.80
  4. Step 4: Simplify right side
    10,404.80x = 116,438,708.14
  5. Step 5: Solve for x
    x = 116,438,708.14/10,404.80
  6. Step 6: Final answer
    x = 11,190.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.