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Finding the Fourth Proportional to 18,315,007.20, 27,472,510.80 and 8,749,069.20

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Solution

The fourth proportional to 18,315,007.20, 27,472,510.80 and 8,749,069.20 is: 13,123,603.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,315,007.20 : 27,472,510.80 = 8,749,069.20 : x
  2. Step 2: Convert to fraction form
    18,315,007.20/27,472,510.80 = 8,749,069.20/x
  3. Step 3: Cross multiply
    18,315,007.20x = 27,472,510.80 × 8,749,069.20
  4. Step 4: Simplify right side
    18,315,007.20x = 240,358,898,086,947.34
  5. Step 5: Solve for x
    x = 240,358,898,086,947.34/18,315,007.20
  6. Step 6: Final answer
    x = 13,123,603.80

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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.