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Finding the Fourth Proportional to 13,891.91, 20,833.00 and 8,618.81

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Solution

The fourth proportional to 13,891.91, 20,833.00 and 8,618.81 is: 12,925.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,891.91 : 20,833.00 = 8,618.81 : x
  2. Step 2: Convert to fraction form
    13,891.91/20,833.00 = 8,618.81/x
  3. Step 3: Cross multiply
    13,891.91x = 20,833.00 × 8,618.81
  4. Step 4: Simplify right side
    13,891.91x = 179,555,543.02
  5. Step 5: Solve for x
    x = 179,555,543.02/13,891.91
  6. Step 6: Final answer
    x = 12,925.19

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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.