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Finding the Fourth Proportional to 18,686.44, 28,037.82 and 9,919.24

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Solution

The fourth proportional to 18,686.44, 28,037.82 and 9,919.24 is: 14,883.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.44 : 28,037.82 = 9,919.24 : x
  2. Step 2: Convert to fraction form
    18,686.44/28,037.82 = 9,919.24/x
  3. Step 3: Cross multiply
    18,686.44x = 28,037.82 × 9,919.24
  4. Step 4: Simplify right side
    18,686.44x = 278,113,865.66
  5. Step 5: Solve for x
    x = 278,113,865.66/18,686.44
  6. Step 6: Final answer
    x = 14,883.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.