Home / 20,255.78-30,397.18-7,108.22

Finding the Fourth Proportional to 20,255.78, 30,397.18 and 7,108.22

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Solution

The fourth proportional to 20,255.78, 30,397.18 and 7,108.22 is: 10,667.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.78 : 30,397.18 = 7,108.22 : x
  2. Step 2: Convert to fraction form
    20,255.78/30,397.18 = 7,108.22/x
  3. Step 3: Cross multiply
    20,255.78x = 30,397.18 × 7,108.22
  4. Step 4: Simplify right side
    20,255.78x = 216,069,842.82
  5. Step 5: Solve for x
    x = 216,069,842.82/20,255.78
  6. Step 6: Final answer
    x = 10,667.07

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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.