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Finding the Fourth Proportional to 12,402,862.80, 18,568,864.80 and 11,127,404.40

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Solution

The fourth proportional to 12,402,862.80, 18,568,864.80 and 11,127,404.40 is: 16,659,320.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,402,862.80 : 18,568,864.80 = 11,127,404.40 : x
  2. Step 2: Convert to fraction form
    12,402,862.80/18,568,864.80 = 11,127,404.40/x
  3. Step 3: Cross multiply
    12,402,862.80x = 18,568,864.80 × 11,127,404.40
  4. Step 4: Simplify right side
    12,402,862.80x = 206,623,267,878,525.12
  5. Step 5: Solve for x
    x = 206,623,267,878,525.12/12,402,862.80
  6. Step 6: Final answer
    x = 16,659,320.61

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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.