Home / 21,311.15-31,962.87-5,725.13

Finding the Fourth Proportional to 21,311.15, 31,962.87 and 5,725.13

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Solution

The fourth proportional to 21,311.15, 31,962.87 and 5,725.13 is: 8,586.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.15 : 31,962.87 = 5,725.13 : x
  2. Step 2: Convert to fraction form
    21,311.15/31,962.87 = 5,725.13/x
  3. Step 3: Cross multiply
    21,311.15x = 31,962.87 × 5,725.13
  4. Step 4: Simplify right side
    21,311.15x = 182,991,426.11
  5. Step 5: Solve for x
    x = 182,991,426.11/21,311.15
  6. Step 6: Final answer
    x = 8,586.65

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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.