Home / 15,438.09-21,305.50-8,723.57

Finding the Fourth Proportional to 15,438.09, 21,305.50 and 8,723.57

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Solution

The fourth proportional to 15,438.09, 21,305.50 and 8,723.57 is: 12,039.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.09 : 21,305.50 = 8,723.57 : x
  2. Step 2: Convert to fraction form
    15,438.09/21,305.50 = 8,723.57/x
  3. Step 3: Cross multiply
    15,438.09x = 21,305.50 × 8,723.57
  4. Step 4: Simplify right side
    15,438.09x = 185,859,892.30
  5. Step 5: Solve for x
    x = 185,859,892.30/15,438.09
  6. Step 6: Final answer
    x = 12,039.04

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1.5x scale

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.