Home / 20,209.10-30,317.04-9,115.52

Finding the Fourth Proportional to 20,209.10, 30,317.04 and 9,115.52

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Solution

The fourth proportional to 20,209.10, 30,317.04 and 9,115.52 is: 13,674.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,209.10 : 30,317.04 = 9,115.52 : x
  2. Step 2: Convert to fraction form
    20,209.10/30,317.04 = 9,115.52/x
  3. Step 3: Cross multiply
    20,209.10x = 30,317.04 × 9,115.52
  4. Step 4: Simplify right side
    20,209.10x = 276,355,432.88
  5. Step 5: Solve for x
    x = 276,355,432.88/20,209.10
  6. Step 6: Final answer
    x = 13,674.80

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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.