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Finding the Fourth Proportional to 18,712.60, 28,071.84 and 7,026.68

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Solution

The fourth proportional to 18,712.60, 28,071.84 and 7,026.68 is: 10,541.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.60 : 28,071.84 = 7,026.68 : x
  2. Step 2: Convert to fraction form
    18,712.60/28,071.84 = 7,026.68/x
  3. Step 3: Cross multiply
    18,712.60x = 28,071.84 × 7,026.68
  4. Step 4: Simplify right side
    18,712.60x = 197,251,836.69
  5. Step 5: Solve for x
    x = 197,251,836.69/18,712.60
  6. Step 6: Final answer
    x = 10,541.12

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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.