Home / 11,121.84-16,748.57-9,678.42

Finding the Fourth Proportional to 11,121.84, 16,748.57 and 9,678.42

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Solution

The fourth proportional to 11,121.84, 16,748.57 and 9,678.42 is: 14,574.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.84 : 16,748.57 = 9,678.42 : x
  2. Step 2: Convert to fraction form
    11,121.84/16,748.57 = 9,678.42/x
  3. Step 3: Cross multiply
    11,121.84x = 16,748.57 × 9,678.42
  4. Step 4: Simplify right side
    11,121.84x = 162,099,719.06
  5. Step 5: Solve for x
    x = 162,099,719.06/11,121.84
  6. Step 6: Final answer
    x = 14,574.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.