Home / 18,678,078.60-28,017,117.90-13,198,331.40

Finding the Fourth Proportional to 18,678,078.60, 28,017,117.90 and 13,198,331.40

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Solution

The fourth proportional to 18,678,078.60, 28,017,117.90 and 13,198,331.40 is: 19,797,497.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678,078.60 : 28,017,117.90 = 13,198,331.40 : x
  2. Step 2: Convert to fraction form
    18,678,078.60/28,017,117.90 = 13,198,331.40/x
  3. Step 3: Cross multiply
    18,678,078.60x = 28,017,117.90 × 13,198,331.40
  4. Step 4: Simplify right side
    18,678,078.60x = 369,779,206,917,072.06
  5. Step 5: Solve for x
    x = 369,779,206,917,072.06/18,678,078.60
  6. Step 6: Final answer
    x = 19,797,497.10

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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.