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Finding the Fourth Proportional to 40,287.64, 60,425.22 and 20,580.76

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Solution

The fourth proportional to 40,287.64, 60,425.22 and 20,580.76 is: 30,867.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,287.64 : 60,425.22 = 20,580.76 : x
  2. Step 2: Convert to fraction form
    40,287.64/60,425.22 = 20,580.76/x
  3. Step 3: Cross multiply
    40,287.64x = 60,425.22 × 20,580.76
  4. Step 4: Simplify right side
    40,287.64x = 1,243,596,950.77
  5. Step 5: Solve for x
    x = 1,243,596,950.77/40,287.64
  6. Step 6: Final answer
    x = 30,867.95

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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.