Home / 20,401.15-28,163.56-15,853.11

Finding the Fourth Proportional to 20,401.15, 28,163.56 and 15,853.11

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Solution

The fourth proportional to 20,401.15, 28,163.56 and 15,853.11 is: 21,885.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.15 : 28,163.56 = 15,853.11 : x
  2. Step 2: Convert to fraction form
    20,401.15/28,163.56 = 15,853.11/x
  3. Step 3: Cross multiply
    20,401.15x = 28,163.56 × 15,853.11
  4. Step 4: Simplify right side
    20,401.15x = 446,480,014.67
  5. Step 5: Solve for x
    x = 446,480,014.67/20,401.15
  6. Step 6: Final answer
    x = 21,885.04

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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.