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Finding the Fourth Proportional to 20,701.68, 31,062.15 and 8,859.08

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Solution

The fourth proportional to 20,701.68, 31,062.15 and 8,859.08 is: 13,292.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.68 : 31,062.15 = 8,859.08 : x
  2. Step 2: Convert to fraction form
    20,701.68/31,062.15 = 8,859.08/x
  3. Step 3: Cross multiply
    20,701.68x = 31,062.15 × 8,859.08
  4. Step 4: Simplify right side
    20,701.68x = 275,181,916.51
  5. Step 5: Solve for x
    x = 275,181,916.51/20,701.68
  6. Step 6: Final answer
    x = 13,292.73

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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.