Home / 20,176.10-30,206.55-12,400.10

Finding the Fourth Proportional to 20,176.10, 30,206.55 and 12,400.10

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Solution

The fourth proportional to 20,176.10, 30,206.55 and 12,400.10 is: 18,564.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,176.10 : 30,206.55 = 12,400.10 : x
  2. Step 2: Convert to fraction form
    20,176.10/30,206.55 = 12,400.10/x
  3. Step 3: Cross multiply
    20,176.10x = 30,206.55 × 12,400.10
  4. Step 4: Simplify right side
    20,176.10x = 374,564,240.66
  5. Step 5: Solve for x
    x = 374,564,240.66/20,176.10
  6. Step 6: Final answer
    x = 18,564.75

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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.