Home / 20,658.31-28,475.75-18,942.12

Finding the Fourth Proportional to 20,658.31, 28,475.75 and 18,942.12

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Solution

The fourth proportional to 20,658.31, 28,475.75 and 18,942.12 is: 26,110.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.31 : 28,475.75 = 18,942.12 : x
  2. Step 2: Convert to fraction form
    20,658.31/28,475.75 = 18,942.12/x
  3. Step 3: Cross multiply
    20,658.31x = 28,475.75 × 18,942.12
  4. Step 4: Simplify right side
    20,658.31x = 539,390,907.69
  5. Step 5: Solve for x
    x = 539,390,907.69/20,658.31
  6. Step 6: Final answer
    x = 26,110.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.