Home / 30,981.75-42,754.50-16,834.65

Finding the Fourth Proportional to 30,981.75, 42,754.50 and 16,834.65

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Solution

The fourth proportional to 30,981.75, 42,754.50 and 16,834.65 is: 23,231.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,981.75 : 42,754.50 = 16,834.65 : x
  2. Step 2: Convert to fraction form
    30,981.75/42,754.50 = 16,834.65/x
  3. Step 3: Cross multiply
    30,981.75x = 42,754.50 × 16,834.65
  4. Step 4: Simplify right side
    30,981.75x = 719,757,043.43
  5. Step 5: Solve for x
    x = 719,757,043.43/30,981.75
  6. Step 6: Final answer
    x = 23,231.65

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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.