Home / 40,961.40-61,431.30-12,881.40

Finding the Fourth Proportional to 40,961.40, 61,431.30 and 12,881.40

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Solution

The fourth proportional to 40,961.40, 61,431.30 and 12,881.40 is: 19,318.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,961.40 : 61,431.30 = 12,881.40 : x
  2. Step 2: Convert to fraction form
    40,961.40/61,431.30 = 12,881.40/x
  3. Step 3: Cross multiply
    40,961.40x = 61,431.30 × 12,881.40
  4. Step 4: Simplify right side
    40,961.40x = 791,321,147.82
  5. Step 5: Solve for x
    x = 791,321,147.82/40,961.40
  6. Step 6: Final answer
    x = 19,318.70

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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.