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Finding the Fourth Proportional to 15,441.44, 21,310.49 and 12,919.10

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Solution

The fourth proportional to 15,441.44, 21,310.49 and 12,919.10 is: 17,829.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,441.44 : 21,310.49 = 12,919.10 : x
  2. Step 2: Convert to fraction form
    15,441.44/21,310.49 = 12,919.10/x
  3. Step 3: Cross multiply
    15,441.44x = 21,310.49 × 12,919.10
  4. Step 4: Simplify right side
    15,441.44x = 275,312,277.10
  5. Step 5: Solve for x
    x = 275,312,277.10/15,441.44
  6. Step 6: Final answer
    x = 17,829.45

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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.