Home / 20,420,779.16-28,187,895.84-18,241,535.72

Finding the Fourth Proportional to 20,420,779.16, 28,187,895.84 and 18,241,535.72

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Solution

The fourth proportional to 20,420,779.16, 28,187,895.84 and 18,241,535.72 is: 25,179,769.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420,779.16 : 28,187,895.84 = 18,241,535.72 : x
  2. Step 2: Convert to fraction form
    20,420,779.16/28,187,895.84 = 18,241,535.72/x
  3. Step 3: Cross multiply
    20,420,779.16x = 28,187,895.84 × 18,241,535.72
  4. Step 4: Simplify right side
    20,420,779.16x = 514,190,508,836,999.38
  5. Step 5: Solve for x
    x = 514,190,508,836,999.38/20,420,779.16
  6. Step 6: Final answer
    x = 25,179,769.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.