Home / 20,140.20-30,215.10-9,743.40

Finding the Fourth Proportional to 20,140.20, 30,215.10 and 9,743.40

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Solution

The fourth proportional to 20,140.20, 30,215.10 and 9,743.40 is: 14,617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.20 : 30,215.10 = 9,743.40 : x
  2. Step 2: Convert to fraction form
    20,140.20/30,215.10 = 9,743.40/x
  3. Step 3: Cross multiply
    20,140.20x = 30,215.10 × 9,743.40
  4. Step 4: Simplify right side
    20,140.20x = 294,397,805.34
  5. Step 5: Solve for x
    x = 294,397,805.34/20,140.20
  6. Step 6: Final answer
    x = 14,617.42

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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.