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Finding the Fourth Proportional to 8,759.90, 12,076.14 and 5,400.47

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Solution

The fourth proportional to 8,759.90, 12,076.14 and 5,400.47 is: 7,444.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.90 : 12,076.14 = 5,400.47 : x
  2. Step 2: Convert to fraction form
    8,759.90/12,076.14 = 5,400.47/x
  3. Step 3: Cross multiply
    8,759.90x = 12,076.14 × 5,400.47
  4. Step 4: Simplify right side
    8,759.90x = 65,216,851.85
  5. Step 5: Solve for x
    x = 65,216,851.85/8,759.90
  6. Step 6: Final answer
    x = 7,444.93

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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.