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Finding the Fourth Proportional to 18,671.16, 28,018.48 and 7,577.92

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Solution

The fourth proportional to 18,671.16, 28,018.48 and 7,577.92 is: 11,371.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.16 : 28,018.48 = 7,577.92 : x
  2. Step 2: Convert to fraction form
    18,671.16/28,018.48 = 7,577.92/x
  3. Step 3: Cross multiply
    18,671.16x = 28,018.48 × 7,577.92
  4. Step 4: Simplify right side
    18,671.16x = 212,321,799.96
  5. Step 5: Solve for x
    x = 212,321,799.96/18,671.16
  6. Step 6: Final answer
    x = 11,371.64

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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.