Home / 20,821,568.50-28,729,681.20-13,082,126.64

Finding the Fourth Proportional to 20,821,568.50, 28,729,681.20 and 13,082,126.64

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Solution

The fourth proportional to 20,821,568.50, 28,729,681.20 and 13,082,126.64 is: 18,050,769.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821,568.50 : 28,729,681.20 = 13,082,126.64 : x
  2. Step 2: Convert to fraction form
    20,821,568.50/28,729,681.20 = 13,082,126.64/x
  3. Step 3: Cross multiply
    20,821,568.50x = 28,729,681.20 × 13,082,126.64
  4. Step 4: Simplify right side
    20,821,568.50x = 375,845,327,785,227.19
  5. Step 5: Solve for x
    x = 375,845,327,785,227.19/20,821,568.50
  6. Step 6: Final answer
    x = 18,050,769.22

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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.