Home / 20,207.70-30,311.55-9,126.90

Finding the Fourth Proportional to 20,207.70, 30,311.55 and 9,126.90

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Solution

The fourth proportional to 20,207.70, 30,311.55 and 9,126.90 is: 13,690.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,207.70 : 30,311.55 = 9,126.90 : x
  2. Step 2: Convert to fraction form
    20,207.70/30,311.55 = 9,126.90/x
  3. Step 3: Cross multiply
    20,207.70x = 30,311.55 × 9,126.90
  4. Step 4: Simplify right side
    20,207.70x = 276,650,485.70
  5. Step 5: Solve for x
    x = 276,650,485.70/20,207.70
  6. Step 6: Final answer
    x = 13,690.35

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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.