Home / 20,428.08-28,193.80-12,474.88

Finding the Fourth Proportional to 20,428.08, 28,193.80 and 12,474.88

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Solution

The fourth proportional to 20,428.08, 28,193.80 and 12,474.88 is: 17,217.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.08 : 28,193.80 = 12,474.88 : x
  2. Step 2: Convert to fraction form
    20,428.08/28,193.80 = 12,474.88/x
  3. Step 3: Cross multiply
    20,428.08x = 28,193.80 × 12,474.88
  4. Step 4: Simplify right side
    20,428.08x = 351,714,271.74
  5. Step 5: Solve for x
    x = 351,714,271.74/20,428.08
  6. Step 6: Final answer
    x = 17,217.20

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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.