Home / 20,639.20-28,482.12-11,207.74

Finding the Fourth Proportional to 20,639.20, 28,482.12 and 11,207.74

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Solution

The fourth proportional to 20,639.20, 28,482.12 and 11,207.74 is: 15,466.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.20 : 28,482.12 = 11,207.74 : x
  2. Step 2: Convert to fraction form
    20,639.20/28,482.12 = 11,207.74/x
  3. Step 3: Cross multiply
    20,639.20x = 28,482.12 × 11,207.74
  4. Step 4: Simplify right side
    20,639.20x = 319,220,195.61
  5. Step 5: Solve for x
    x = 319,220,195.61/20,639.20
  6. Step 6: Final answer
    x = 15,466.69

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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.