Home / 20,712.66-30,912.49-19,308.12

Finding the Fourth Proportional to 20,712.66, 30,912.49 and 19,308.12

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Solution

The fourth proportional to 20,712.66, 30,912.49 and 19,308.12 is: 28,816.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.66 : 30,912.49 = 19,308.12 : x
  2. Step 2: Convert to fraction form
    20,712.66/30,912.49 = 19,308.12/x
  3. Step 3: Cross multiply
    20,712.66x = 30,912.49 × 19,308.12
  4. Step 4: Simplify right side
    20,712.66x = 596,862,066.42
  5. Step 5: Solve for x
    x = 596,862,066.42/20,712.66
  6. Step 6: Final answer
    x = 28,816.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.