Home / 20,387.50-28,134.80-11,895.46

Finding the Fourth Proportional to 20,387.50, 28,134.80 and 11,895.46

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Solution

The fourth proportional to 20,387.50, 28,134.80 and 11,895.46 is: 16,415.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.50 : 28,134.80 = 11,895.46 : x
  2. Step 2: Convert to fraction form
    20,387.50/28,134.80 = 11,895.46/x
  3. Step 3: Cross multiply
    20,387.50x = 28,134.80 × 11,895.46
  4. Step 4: Simplify right side
    20,387.50x = 334,676,388.01
  5. Step 5: Solve for x
    x = 334,676,388.01/20,387.50
  6. Step 6: Final answer
    x = 16,415.76

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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.