Home / 20,279,084.72-30,271,111.47-18,780,421.10

Finding the Fourth Proportional to 20,279,084.72, 30,271,111.47 and 18,780,421.10

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Solution

The fourth proportional to 20,279,084.72, 30,271,111.47 and 18,780,421.10 is: 28,034,017.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279,084.72 : 30,271,111.47 = 18,780,421.10 : x
  2. Step 2: Convert to fraction form
    20,279,084.72/30,271,111.47 = 18,780,421.10/x
  3. Step 3: Cross multiply
    20,279,084.72x = 30,271,111.47 × 18,780,421.10
  4. Step 4: Simplify right side
    20,279,084.72x = 568,504,220,420,284.38
  5. Step 5: Solve for x
    x = 568,504,220,420,284.38/20,279,084.72
  6. Step 6: Final answer
    x = 28,034,017.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.