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Finding the Fourth Proportional to 8,907.10, 13,389.45 and 8,215.90

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Solution

The fourth proportional to 8,907.10, 13,389.45 and 8,215.90 is: 12,350.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,907.10 : 13,389.45 = 8,215.90 : x
  2. Step 2: Convert to fraction form
    8,907.10/13,389.45 = 8,215.90/x
  3. Step 3: Cross multiply
    8,907.10x = 13,389.45 × 8,215.90
  4. Step 4: Simplify right side
    8,907.10x = 110,006,382.26
  5. Step 5: Solve for x
    x = 110,006,382.26/8,907.10
  6. Step 6: Final answer
    x = 12,350.42

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1.5x scale

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.