Home / 20,942.80-31,419.67-10,948.21

Finding the Fourth Proportional to 20,942.80, 31,419.67 and 10,948.21

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Solution

The fourth proportional to 20,942.80, 31,419.67 and 10,948.21 is: 16,425.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.80 : 31,419.67 = 10,948.21 : x
  2. Step 2: Convert to fraction form
    20,942.80/31,419.67 = 10,948.21/x
  3. Step 3: Cross multiply
    20,942.80x = 31,419.67 × 10,948.21
  4. Step 4: Simplify right side
    20,942.80x = 343,989,117.92
  5. Step 5: Solve for x
    x = 343,989,117.92/20,942.80
  6. Step 6: Final answer
    x = 16,425.17

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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.