Home / 15,932.85-21,985.20-8,857.91

Finding the Fourth Proportional to 15,932.85, 21,985.20 and 8,857.91

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Solution

The fourth proportional to 15,932.85, 21,985.20 and 8,857.91 is: 12,222.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,932.85 : 21,985.20 = 8,857.91 : x
  2. Step 2: Convert to fraction form
    15,932.85/21,985.20 = 8,857.91/x
  3. Step 3: Cross multiply
    15,932.85x = 21,985.20 × 8,857.91
  4. Step 4: Simplify right side
    15,932.85x = 194,742,813.01
  5. Step 5: Solve for x
    x = 194,742,813.01/15,932.85
  6. Step 6: Final answer
    x = 12,222.72

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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.