Home / 12,981.15-17,914.68-7,315.65

Finding the Fourth Proportional to 12,981.15, 17,914.68 and 7,315.65

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Solution

The fourth proportional to 12,981.15, 17,914.68 and 7,315.65 is: 10,095.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.15 : 17,914.68 = 7,315.65 : x
  2. Step 2: Convert to fraction form
    12,981.15/17,914.68 = 7,315.65/x
  3. Step 3: Cross multiply
    12,981.15x = 17,914.68 × 7,315.65
  4. Step 4: Simplify right side
    12,981.15x = 131,057,528.74
  5. Step 5: Solve for x
    x = 131,057,528.74/12,981.15
  6. Step 6: Final answer
    x = 10,095.99

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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.