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Finding the Fourth Proportional to 8,387.10, 12,580.64 and 2,146.88

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Solution

The fourth proportional to 8,387.10, 12,580.64 and 2,146.88 is: 3,220.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.10 : 12,580.64 = 2,146.88 : x
  2. Step 2: Convert to fraction form
    8,387.10/12,580.64 = 2,146.88/x
  3. Step 3: Cross multiply
    8,387.10x = 12,580.64 × 2,146.88
  4. Step 4: Simplify right side
    8,387.10x = 27,009,124.40
  5. Step 5: Solve for x
    x = 27,009,124.40/8,387.10
  6. Step 6: Final answer
    x = 3,220.32

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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.