Home / 20,797.56-28,701.20-12,731.05

Finding the Fourth Proportional to 20,797.56, 28,701.20 and 12,731.05

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Solution

The fourth proportional to 20,797.56, 28,701.20 and 12,731.05 is: 17,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.56 : 28,701.20 = 12,731.05 : x
  2. Step 2: Convert to fraction form
    20,797.56/28,701.20 = 12,731.05/x
  3. Step 3: Cross multiply
    20,797.56x = 28,701.20 × 12,731.05
  4. Step 4: Simplify right side
    20,797.56x = 365,396,412.26
  5. Step 5: Solve for x
    x = 365,396,412.26/20,797.56
  6. Step 6: Final answer
    x = 17,569.20

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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.