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Finding the Fourth Proportional to 5,661.18, 8,490.15 and 1,962.45

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Solution

The fourth proportional to 5,661.18, 8,490.15 and 1,962.45 is: 2,943.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,661.18 : 8,490.15 = 1,962.45 : x
  2. Step 2: Convert to fraction form
    5,661.18/8,490.15 = 1,962.45/x
  3. Step 3: Cross multiply
    5,661.18x = 8,490.15 × 1,962.45
  4. Step 4: Simplify right side
    5,661.18x = 16,661,494.87
  5. Step 5: Solve for x
    x = 16,661,494.87/5,661.18
  6. Step 6: Final answer
    x = 2,943.11

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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.