Home / 20,747.78-28,655.82-15,107.74

Finding the Fourth Proportional to 20,747.78, 28,655.82 and 15,107.74

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Solution

The fourth proportional to 20,747.78, 28,655.82 and 15,107.74 is: 20,866.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.78 : 28,655.82 = 15,107.74 : x
  2. Step 2: Convert to fraction form
    20,747.78/28,655.82 = 15,107.74/x
  3. Step 3: Cross multiply
    20,747.78x = 28,655.82 × 15,107.74
  4. Step 4: Simplify right side
    20,747.78x = 432,924,678.05
  5. Step 5: Solve for x
    x = 432,924,678.05/20,747.78
  6. Step 6: Final answer
    x = 20,866.07

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1.5x scale

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.