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Finding the Fourth Proportional to 17,818.87, 26,720.52 and 8,461.57

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Solution

The fourth proportional to 17,818.87, 26,720.52 and 8,461.57 is: 12,688.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,818.87 : 26,720.52 = 8,461.57 : x
  2. Step 2: Convert to fraction form
    17,818.87/26,720.52 = 8,461.57/x
  3. Step 3: Cross multiply
    17,818.87x = 26,720.52 × 8,461.57
  4. Step 4: Simplify right side
    17,818.87x = 226,097,550.42
  5. Step 5: Solve for x
    x = 226,097,550.42/17,818.87
  6. Step 6: Final answer
    x = 12,688.66

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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.