Home / 21,041.20-31,561.51-12,169.88

Finding the Fourth Proportional to 21,041.20, 31,561.51 and 12,169.88

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Solution

The fourth proportional to 21,041.20, 31,561.51 and 12,169.88 is: 18,254.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,041.20 : 31,561.51 = 12,169.88 : x
  2. Step 2: Convert to fraction form
    21,041.20/31,561.51 = 12,169.88/x
  3. Step 3: Cross multiply
    21,041.20x = 31,561.51 × 12,169.88
  4. Step 4: Simplify right side
    21,041.20x = 384,099,789.32
  5. Step 5: Solve for x
    x = 384,099,789.32/21,041.20
  6. Step 6: Final answer
    x = 18,254.65

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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.