Home / 30,976.38-42,723.62-20,888.84

Finding the Fourth Proportional to 30,976.38, 42,723.62 and 20,888.84

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Solution

The fourth proportional to 30,976.38, 42,723.62 and 20,888.84 is: 28,810.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,976.38 : 42,723.62 = 20,888.84 : x
  2. Step 2: Convert to fraction form
    30,976.38/42,723.62 = 20,888.84/x
  3. Step 3: Cross multiply
    30,976.38x = 42,723.62 × 20,888.84
  4. Step 4: Simplify right side
    30,976.38x = 892,446,862.40
  5. Step 5: Solve for x
    x = 892,446,862.40/30,976.38
  6. Step 6: Final answer
    x = 28,810.56

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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.