Home / 15,399.15-21,250.82-8,325.51

Finding the Fourth Proportional to 15,399.15, 21,250.82 and 8,325.51

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Solution

The fourth proportional to 15,399.15, 21,250.82 and 8,325.51 is: 11,489.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.15 : 21,250.82 = 8,325.51 : x
  2. Step 2: Convert to fraction form
    15,399.15/21,250.82 = 8,325.51/x
  3. Step 3: Cross multiply
    15,399.15x = 21,250.82 × 8,325.51
  4. Step 4: Simplify right side
    15,399.15x = 176,923,872.79
  5. Step 5: Solve for x
    x = 176,923,872.79/15,399.15
  6. Step 6: Final answer
    x = 11,489.20

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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.