Home / 10,211.40-15,315.60-3,189.78

Finding the Fourth Proportional to 10,211.40, 15,315.60 and 3,189.78

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Solution

The fourth proportional to 10,211.40, 15,315.60 and 3,189.78 is: 4,784.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,211.40 : 15,315.60 = 3,189.78 : x
  2. Step 2: Convert to fraction form
    10,211.40/15,315.60 = 3,189.78/x
  3. Step 3: Cross multiply
    10,211.40x = 15,315.60 × 3,189.78
  4. Step 4: Simplify right side
    10,211.40x = 48,853,394.57
  5. Step 5: Solve for x
    x = 48,853,394.57/10,211.40
  6. Step 6: Final answer
    x = 4,784.20

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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.