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Finding the Fourth Proportional to 18,690.70, 28,002.02 and 10,875.82

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Solution

The fourth proportional to 18,690.70, 28,002.02 and 10,875.82 is: 16,293.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.70 : 28,002.02 = 10,875.82 : x
  2. Step 2: Convert to fraction form
    18,690.70/28,002.02 = 10,875.82/x
  3. Step 3: Cross multiply
    18,690.70x = 28,002.02 × 10,875.82
  4. Step 4: Simplify right side
    18,690.70x = 304,544,929.16
  5. Step 5: Solve for x
    x = 304,544,929.16/18,690.70
  6. Step 6: Final answer
    x = 16,293.93

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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.