Home / 20,443.20-28,211.90-12,376.76

Finding the Fourth Proportional to 20,443.20, 28,211.90 and 12,376.76

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Solution

The fourth proportional to 20,443.20, 28,211.90 and 12,376.76 is: 17,080.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,443.20 : 28,211.90 = 12,376.76 : x
  2. Step 2: Convert to fraction form
    20,443.20/28,211.90 = 12,376.76/x
  3. Step 3: Cross multiply
    20,443.20x = 28,211.90 × 12,376.76
  4. Step 4: Simplify right side
    20,443.20x = 349,171,915.44
  5. Step 5: Solve for x
    x = 349,171,915.44/20,443.20
  6. Step 6: Final answer
    x = 17,080.10

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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.