Home / 18,712.92-28,068.34-11,315.38

Finding the Fourth Proportional to 18,712.92, 28,068.34 and 11,315.38

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Solution

The fourth proportional to 18,712.92, 28,068.34 and 11,315.38 is: 16,972.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,712.92 : 28,068.34 = 11,315.38 : x
  2. Step 2: Convert to fraction form
    18,712.92/28,068.34 = 11,315.38/x
  3. Step 3: Cross multiply
    18,712.92x = 28,068.34 × 11,315.38
  4. Step 4: Simplify right side
    18,712.92x = 317,603,933.07
  5. Step 5: Solve for x
    x = 317,603,933.07/18,712.92
  6. Step 6: Final answer
    x = 16,972.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.