Home / 15,139.32-20,889.12-8,850.48

Finding the Fourth Proportional to 15,139.32, 20,889.12 and 8,850.48

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Solution

The fourth proportional to 15,139.32, 20,889.12 and 8,850.48 is: 12,211.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.32 : 20,889.12 = 8,850.48 : x
  2. Step 2: Convert to fraction form
    15,139.32/20,889.12 = 8,850.48/x
  3. Step 3: Cross multiply
    15,139.32x = 20,889.12 × 8,850.48
  4. Step 4: Simplify right side
    15,139.32x = 184,878,738.78
  5. Step 5: Solve for x
    x = 184,878,738.78/15,139.32
  6. Step 6: Final answer
    x = 12,211.83

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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.