Home / 20,172.70-30,233.85-10,315.90

Finding the Fourth Proportional to 20,172.70, 30,233.85 and 10,315.90

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Solution

The fourth proportional to 20,172.70, 30,233.85 and 10,315.90 is: 15,460.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.70 : 30,233.85 = 10,315.90 : x
  2. Step 2: Convert to fraction form
    20,172.70/30,233.85 = 10,315.90/x
  3. Step 3: Cross multiply
    20,172.70x = 30,233.85 × 10,315.90
  4. Step 4: Simplify right side
    20,172.70x = 311,889,373.22
  5. Step 5: Solve for x
    x = 311,889,373.22/20,172.70
  6. Step 6: Final answer
    x = 15,460.96

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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.