Home / 40,900.72-61,351.85-12,820.15

Finding the Fourth Proportional to 40,900.72, 61,351.85 and 12,820.15

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Solution

The fourth proportional to 40,900.72, 61,351.85 and 12,820.15 is: 19,230.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,900.72 : 61,351.85 = 12,820.15 : x
  2. Step 2: Convert to fraction form
    40,900.72/61,351.85 = 12,820.15/x
  3. Step 3: Cross multiply
    40,900.72x = 61,351.85 × 12,820.15
  4. Step 4: Simplify right side
    40,900.72x = 786,539,919.78
  5. Step 5: Solve for x
    x = 786,539,919.78/40,900.72
  6. Step 6: Final answer
    x = 19,230.47

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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.