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Finding the Fourth Proportional to 6,653.12, 9,978.29 and 1,972.02

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Solution

The fourth proportional to 6,653.12, 9,978.29 and 1,972.02 is: 2,957.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,653.12 : 9,978.29 = 1,972.02 : x
  2. Step 2: Convert to fraction form
    6,653.12/9,978.29 = 1,972.02/x
  3. Step 3: Cross multiply
    6,653.12x = 9,978.29 × 1,972.02
  4. Step 4: Simplify right side
    6,653.12x = 19,677,377.59
  5. Step 5: Solve for x
    x = 19,677,377.59/6,653.12
  6. Step 6: Final answer
    x = 2,957.62

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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.