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Finding the Fourth Proportional to 18,782,895.80, 28,174,343.70 and 9,216,957.80

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Solution

The fourth proportional to 18,782,895.80, 28,174,343.70 and 9,216,957.80 is: 13,825,436.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782,895.80 : 28,174,343.70 = 9,216,957.80 : x
  2. Step 2: Convert to fraction form
    18,782,895.80/28,174,343.70 = 9,216,957.80/x
  3. Step 3: Cross multiply
    18,782,895.80x = 28,174,343.70 × 9,216,957.80
  4. Step 4: Simplify right side
    18,782,895.80x = 259,681,736,925,595.88
  5. Step 5: Solve for x
    x = 259,681,736,925,595.88/18,782,895.80
  6. Step 6: Final answer
    x = 13,825,436.70

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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.