Home / 20,635.35-28,465.05-12,671.97

Finding the Fourth Proportional to 20,635.35, 28,465.05 and 12,671.97

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Solution

The fourth proportional to 20,635.35, 28,465.05 and 12,671.97 is: 17,480.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.35 : 28,465.05 = 12,671.97 : x
  2. Step 2: Convert to fraction form
    20,635.35/28,465.05 = 12,671.97/x
  3. Step 3: Cross multiply
    20,635.35x = 28,465.05 × 12,671.97
  4. Step 4: Simplify right side
    20,635.35x = 360,708,259.65
  5. Step 5: Solve for x
    x = 360,708,259.65/20,635.35
  6. Step 6: Final answer
    x = 17,480.11

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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.