Home / 20,775.90-31,165.47-10,251.57

Finding the Fourth Proportional to 20,775.90, 31,165.47 and 10,251.57

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Solution

The fourth proportional to 20,775.90, 31,165.47 and 10,251.57 is: 15,378.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.90 : 31,165.47 = 10,251.57 : x
  2. Step 2: Convert to fraction form
    20,775.90/31,165.47 = 10,251.57/x
  3. Step 3: Cross multiply
    20,775.90x = 31,165.47 × 10,251.57
  4. Step 4: Simplify right side
    20,775.90x = 319,494,997.29
  5. Step 5: Solve for x
    x = 319,494,997.29/20,775.90
  6. Step 6: Final answer
    x = 15,378.15

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1.5x scale

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.