Home / 18,721,813.85-28,082,720.78-15,698,505.05

Finding the Fourth Proportional to 18,721,813.85, 28,082,720.78 and 15,698,505.05

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Solution

The fourth proportional to 18,721,813.85, 28,082,720.78 and 15,698,505.05 is: 23,547,757.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,813.85 : 28,082,720.78 = 15,698,505.05 : x
  2. Step 2: Convert to fraction form
    18,721,813.85/28,082,720.78 = 15,698,505.05/x
  3. Step 3: Cross multiply
    18,721,813.85x = 28,082,720.78 × 15,698,505.05
  4. Step 4: Simplify right side
    18,721,813.85x = 440,856,733,982,570
  5. Step 5: Solve for x
    x = 440,856,733,982,570/18,721,813.85
  6. Step 6: Final answer
    x = 23,547,757.58

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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.