Home / 15,108.72-20,850.12-8,824.20

Finding the Fourth Proportional to 15,108.72, 20,850.12 and 8,824.20

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Solution

The fourth proportional to 15,108.72, 20,850.12 and 8,824.20 is: 12,177.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.72 : 20,850.12 = 8,824.20 : x
  2. Step 2: Convert to fraction form
    15,108.72/20,850.12 = 8,824.20/x
  3. Step 3: Cross multiply
    15,108.72x = 20,850.12 × 8,824.20
  4. Step 4: Simplify right side
    15,108.72x = 183,985,628.90
  5. Step 5: Solve for x
    x = 183,985,628.90/15,108.72
  6. Step 6: Final answer
    x = 12,177.45

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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.