Home / 19,431.54-26,815.20-11,876.70

Finding the Fourth Proportional to 19,431.54, 26,815.20 and 11,876.70

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Solution

The fourth proportional to 19,431.54, 26,815.20 and 11,876.70 is: 16,389.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,431.54 : 26,815.20 = 11,876.70 : x
  2. Step 2: Convert to fraction form
    19,431.54/26,815.20 = 11,876.70/x
  3. Step 3: Cross multiply
    19,431.54x = 26,815.20 × 11,876.70
  4. Step 4: Simplify right side
    19,431.54x = 318,476,085.84
  5. Step 5: Solve for x
    x = 318,476,085.84/19,431.54
  6. Step 6: Final answer
    x = 16,389.65

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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.