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Finding the Fourth Proportional to 28,647.40, 42,966.14 and 7,866.04

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Solution

The fourth proportional to 28,647.40, 42,966.14 and 7,866.04 is: 11,797.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,647.40 : 42,966.14 = 7,866.04 : x
  2. Step 2: Convert to fraction form
    28,647.40/42,966.14 = 7,866.04/x
  3. Step 3: Cross multiply
    28,647.40x = 42,966.14 × 7,866.04
  4. Step 4: Simplify right side
    28,647.40x = 337,973,375.89
  5. Step 5: Solve for x
    x = 337,973,375.89/28,647.40
  6. Step 6: Final answer
    x = 11,797.70

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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.