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Finding the Fourth Proportional to 6,360.69, 9,539.82 and 1,978.20

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Solution

The fourth proportional to 6,360.69, 9,539.82 and 1,978.20 is: 2,966.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,360.69 : 9,539.82 = 1,978.20 : x
  2. Step 2: Convert to fraction form
    6,360.69/9,539.82 = 1,978.20/x
  3. Step 3: Cross multiply
    6,360.69x = 9,539.82 × 1,978.20
  4. Step 4: Simplify right side
    6,360.69x = 18,871,671.92
  5. Step 5: Solve for x
    x = 18,871,671.92/6,360.69
  6. Step 6: Final answer
    x = 2,966.92

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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.