Home / 28,226.64-42,351.30-12,655.20

Finding the Fourth Proportional to 28,226.64, 42,351.30 and 12,655.20

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Solution

The fourth proportional to 28,226.64, 42,351.30 and 12,655.20 is: 18,987.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,226.64 : 42,351.30 = 12,655.20 : x
  2. Step 2: Convert to fraction form
    28,226.64/42,351.30 = 12,655.20/x
  3. Step 3: Cross multiply
    28,226.64x = 42,351.30 × 12,655.20
  4. Step 4: Simplify right side
    28,226.64x = 535,964,171.76
  5. Step 5: Solve for x
    x = 535,964,171.76/28,226.64
  6. Step 6: Final answer
    x = 18,987.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.