Home / 20,642.40-28,487.04-12,145.12

Finding the Fourth Proportional to 20,642.40, 28,487.04 and 12,145.12

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Solution

The fourth proportional to 20,642.40, 28,487.04 and 12,145.12 is: 16,760.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.40 : 28,487.04 = 12,145.12 : x
  2. Step 2: Convert to fraction form
    20,642.40/28,487.04 = 12,145.12/x
  3. Step 3: Cross multiply
    20,642.40x = 28,487.04 × 12,145.12
  4. Step 4: Simplify right side
    20,642.40x = 345,978,519.24
  5. Step 5: Solve for x
    x = 345,978,519.24/20,642.40
  6. Step 6: Final answer
    x = 16,760.58

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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.