Home / 20,775.49-31,172.37-10,912.48

Finding the Fourth Proportional to 20,775.49, 31,172.37 and 10,912.48

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Solution

The fourth proportional to 20,775.49, 31,172.37 and 10,912.48 is: 16,373.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.49 : 31,172.37 = 10,912.48 : x
  2. Step 2: Convert to fraction form
    20,775.49/31,172.37 = 10,912.48/x
  3. Step 3: Cross multiply
    20,775.49x = 31,172.37 × 10,912.48
  4. Step 4: Simplify right side
    20,775.49x = 340,167,864.18
  5. Step 5: Solve for x
    x = 340,167,864.18/20,775.49
  6. Step 6: Final answer
    x = 16,373.52

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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.