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Finding the Fourth Proportional to 8,660.07, 12,978.14 and 4,954.47

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Solution

The fourth proportional to 8,660.07, 12,978.14 and 4,954.47 is: 7,424.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.07 : 12,978.14 = 4,954.47 : x
  2. Step 2: Convert to fraction form
    8,660.07/12,978.14 = 4,954.47/x
  3. Step 3: Cross multiply
    8,660.07x = 12,978.14 × 4,954.47
  4. Step 4: Simplify right side
    8,660.07x = 64,299,780.51
  5. Step 5: Solve for x
    x = 64,299,780.51/8,660.07
  6. Step 6: Final answer
    x = 7,424.86

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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.