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Finding the Fourth Proportional to 39,980, 55,177.26 and 23,213

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Solution

The fourth proportional to 39,980, 55,177.26 and 23,213 is: 32,036.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,980 : 55,177.26 = 23,213 : x
  2. Step 2: Convert to fraction form
    39,980/55,177.26 = 23,213/x
  3. Step 3: Cross multiply
    39,980x = 55,177.26 × 23,213
  4. Step 4: Simplify right side
    39,980x = 1,280,829,736.38
  5. Step 5: Solve for x
    x = 1,280,829,736.38/39,980
  6. Step 6: Final answer
    x = 32,036.76

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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.