Home / 30,828.11-42,542.79-16,680.95

Finding the Fourth Proportional to 30,828.11, 42,542.79 and 16,680.95

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Solution

The fourth proportional to 30,828.11, 42,542.79 and 16,680.95 is: 23,019.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,828.11 : 42,542.79 = 16,680.95 : x
  2. Step 2: Convert to fraction form
    30,828.11/42,542.79 = 16,680.95/x
  3. Step 3: Cross multiply
    30,828.11x = 42,542.79 × 16,680.95
  4. Step 4: Simplify right side
    30,828.11x = 709,654,152.85
  5. Step 5: Solve for x
    x = 709,654,152.85/30,828.11
  6. Step 6: Final answer
    x = 23,019.71

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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.