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Finding the Fourth Proportional to 28,758.66, 39,700.71 and 16,818.18

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Solution

The fourth proportional to 28,758.66, 39,700.71 and 16,818.18 is: 23,217.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,758.66 : 39,700.71 = 16,818.18 : x
  2. Step 2: Convert to fraction form
    28,758.66/39,700.71 = 16,818.18/x
  3. Step 3: Cross multiply
    28,758.66x = 39,700.71 × 16,818.18
  4. Step 4: Simplify right side
    28,758.66x = 667,693,686.91
  5. Step 5: Solve for x
    x = 667,693,686.91/28,758.66
  6. Step 6: Final answer
    x = 23,217.13

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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.