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Finding the Fourth Proportional to 39,580.40, 59,287.80 and 18,538.40

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Solution

The fourth proportional to 39,580.40, 59,287.80 and 18,538.40 is: 27,768.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,580.40 : 59,287.80 = 18,538.40 : x
  2. Step 2: Convert to fraction form
    39,580.40/59,287.80 = 18,538.40/x
  3. Step 3: Cross multiply
    39,580.40x = 59,287.80 × 18,538.40
  4. Step 4: Simplify right side
    39,580.40x = 1,099,100,951.52
  5. Step 5: Solve for x
    x = 1,099,100,951.52/39,580.40
  6. Step 6: Final answer
    x = 27,768.82

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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.