Home / 20,206.42-30,315.71-12,210.10

Finding the Fourth Proportional to 20,206.42, 30,315.71 and 12,210.10

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Solution

The fourth proportional to 20,206.42, 30,315.71 and 12,210.10 is: 18,318.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,206.42 : 30,315.71 = 12,210.10 : x
  2. Step 2: Convert to fraction form
    20,206.42/30,315.71 = 12,210.10/x
  3. Step 3: Cross multiply
    20,206.42x = 30,315.71 × 12,210.10
  4. Step 4: Simplify right side
    20,206.42x = 370,157,850.67
  5. Step 5: Solve for x
    x = 370,157,850.67/20,206.42
  6. Step 6: Final answer
    x = 18,318.82

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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.