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Finding the Fourth Proportional to 12,861.60, 17,741.05 and 8,826.58

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Solution

The fourth proportional to 12,861.60, 17,741.05 and 8,826.58 is: 12,175.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,861.60 : 17,741.05 = 8,826.58 : x
  2. Step 2: Convert to fraction form
    12,861.60/17,741.05 = 8,826.58/x
  3. Step 3: Cross multiply
    12,861.60x = 17,741.05 × 8,826.58
  4. Step 4: Simplify right side
    12,861.60x = 156,592,797.11
  5. Step 5: Solve for x
    x = 156,592,797.11/12,861.60
  6. Step 6: Final answer
    x = 12,175.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.