Home / 20,424.12-30,632.82-12,680.76

Finding the Fourth Proportional to 20,424.12, 30,632.82 and 12,680.76

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Solution

The fourth proportional to 20,424.12, 30,632.82 and 12,680.76 is: 19,019.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,424.12 : 30,632.82 = 12,680.76 : x
  2. Step 2: Convert to fraction form
    20,424.12/30,632.82 = 12,680.76/x
  3. Step 3: Cross multiply
    20,424.12x = 30,632.82 × 12,680.76
  4. Step 4: Simplify right side
    20,424.12x = 388,447,438.54
  5. Step 5: Solve for x
    x = 388,447,438.54/20,424.12
  6. Step 6: Final answer
    x = 19,019.05

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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.