Home / 21,942.05-30,279.89-11,870.45

Finding the Fourth Proportional to 21,942.05, 30,279.89 and 11,870.45

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Solution

The fourth proportional to 21,942.05, 30,279.89 and 11,870.45 is: 16,381.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942.05 : 30,279.89 = 11,870.45 : x
  2. Step 2: Convert to fraction form
    21,942.05/30,279.89 = 11,870.45/x
  3. Step 3: Cross multiply
    21,942.05x = 30,279.89 × 11,870.45
  4. Step 4: Simplify right side
    21,942.05x = 359,435,709.50
  5. Step 5: Solve for x
    x = 359,435,709.50/21,942.05
  6. Step 6: Final answer
    x = 16,381.14

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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.