Home / 19,880.70-27,431.49-12,806.10

Finding the Fourth Proportional to 19,880.70, 27,431.49 and 12,806.10

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Solution

The fourth proportional to 19,880.70, 27,431.49 and 12,806.10 is: 17,669.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,880.70 : 27,431.49 = 12,806.10 : x
  2. Step 2: Convert to fraction form
    19,880.70/27,431.49 = 12,806.10/x
  3. Step 3: Cross multiply
    19,880.70x = 27,431.49 × 12,806.10
  4. Step 4: Simplify right side
    19,880.70x = 351,290,404.09
  5. Step 5: Solve for x
    x = 351,290,404.09/19,880.70
  6. Step 6: Final answer
    x = 17,669.92

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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.