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Finding the Fourth Proportional to 8,907.80, 13,358.10 and 3,061.40

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Solution

The fourth proportional to 8,907.80, 13,358.10 and 3,061.40 is: 4,590.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,907.80 : 13,358.10 = 3,061.40 : x
  2. Step 2: Convert to fraction form
    8,907.80/13,358.10 = 3,061.40/x
  3. Step 3: Cross multiply
    8,907.80x = 13,358.10 × 3,061.40
  4. Step 4: Simplify right side
    8,907.80x = 40,894,487.34
  5. Step 5: Solve for x
    x = 40,894,487.34/8,907.80
  6. Step 6: Final answer
    x = 4,590.86

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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.