Home / 20,166.35-30,255.68-10,312.55

Finding the Fourth Proportional to 20,166.35, 30,255.68 and 10,312.55

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Solution

The fourth proportional to 20,166.35, 30,255.68 and 10,312.55 is: 15,471.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,166.35 : 30,255.68 = 10,312.55 : x
  2. Step 2: Convert to fraction form
    20,166.35/30,255.68 = 10,312.55/x
  3. Step 3: Cross multiply
    20,166.35x = 30,255.68 × 10,312.55
  4. Step 4: Simplify right side
    20,166.35x = 312,013,314.20
  5. Step 5: Solve for x
    x = 312,013,314.20/20,166.35
  6. Step 6: Final answer
    x = 15,471.98

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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.