Home / 20,172.20-30,233.10-10,315.40

Finding the Fourth Proportional to 20,172.20, 30,233.10 and 10,315.40

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Solution

The fourth proportional to 20,172.20, 30,233.10 and 10,315.40 is: 15,460.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.20 : 30,233.10 = 10,315.40 : x
  2. Step 2: Convert to fraction form
    20,172.20/30,233.10 = 10,315.40/x
  3. Step 3: Cross multiply
    20,172.20x = 30,233.10 × 10,315.40
  4. Step 4: Simplify right side
    20,172.20x = 311,866,519.74
  5. Step 5: Solve for x
    x = 311,866,519.74/20,172.20
  6. Step 6: Final answer
    x = 15,460.21

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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.