Home / 36,120.32-54,143.54-12,420.76

Finding the Fourth Proportional to 36,120.32, 54,143.54 and 12,420.76

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Solution

The fourth proportional to 36,120.32, 54,143.54 and 12,420.76 is: 18,618.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,120.32 : 54,143.54 = 12,420.76 : x
  2. Step 2: Convert to fraction form
    36,120.32/54,143.54 = 12,420.76/x
  3. Step 3: Cross multiply
    36,120.32x = 54,143.54 × 12,420.76
  4. Step 4: Simplify right side
    36,120.32x = 672,503,915.89
  5. Step 5: Solve for x
    x = 672,503,915.89/36,120.32
  6. Step 6: Final answer
    x = 18,618.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.