Home / 15,210.89-20,991.84-8,496.66

Finding the Fourth Proportional to 15,210.89, 20,991.84 and 8,496.66

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Solution

The fourth proportional to 15,210.89, 20,991.84 and 8,496.66 is: 11,725.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,210.89 : 20,991.84 = 8,496.66 : x
  2. Step 2: Convert to fraction form
    15,210.89/20,991.84 = 8,496.66/x
  3. Step 3: Cross multiply
    15,210.89x = 20,991.84 × 8,496.66
  4. Step 4: Simplify right side
    15,210.89x = 178,360,527.25
  5. Step 5: Solve for x
    x = 178,360,527.25/15,210.89
  6. Step 6: Final answer
    x = 11,725.85

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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.