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Finding the Fourth Proportional to 18,982,649.28, 28,484,339.78 and 8,051,138.57

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Solution

The fourth proportional to 18,982,649.28, 28,484,339.78 and 8,051,138.57 is: 12,081,104.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,982,649.28 : 28,484,339.78 = 8,051,138.57 : x
  2. Step 2: Convert to fraction form
    18,982,649.28/28,484,339.78 = 8,051,138.57/x
  3. Step 3: Cross multiply
    18,982,649.28x = 28,484,339.78 × 8,051,138.57
  4. Step 4: Simplify right side
    18,982,649.28x = 229,331,366,735,082
  5. Step 5: Solve for x
    x = 229,331,366,735,082/18,982,649.28
  6. Step 6: Final answer
    x = 12,081,104.35

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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.