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Finding the Fourth Proportional to 18,726,480.80, 28,047,730.80 and 15,367,248.80

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Solution

The fourth proportional to 18,726,480.80, 28,047,730.80 and 15,367,248.80 is: 23,016,415.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726,480.80 : 28,047,730.80 = 15,367,248.80 : x
  2. Step 2: Convert to fraction form
    18,726,480.80/28,047,730.80 = 15,367,248.80/x
  3. Step 3: Cross multiply
    18,726,480.80x = 28,047,730.80 × 15,367,248.80
  4. Step 4: Simplify right side
    18,726,480.80x = 431,016,457,479,023.06
  5. Step 5: Solve for x
    x = 431,016,457,479,023.06/18,726,480.80
  6. Step 6: Final answer
    x = 23,016,415.21

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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.