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Finding the Fourth Proportional to 18,671.60, 28,008.12 and 4,820.24

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Solution

The fourth proportional to 18,671.60, 28,008.12 and 4,820.24 is: 7,230.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.60 : 28,008.12 = 4,820.24 : x
  2. Step 2: Convert to fraction form
    18,671.60/28,008.12 = 4,820.24/x
  3. Step 3: Cross multiply
    18,671.60x = 28,008.12 × 4,820.24
  4. Step 4: Simplify right side
    18,671.60x = 135,005,860.35
  5. Step 5: Solve for x
    x = 135,005,860.35/18,671.60
  6. Step 6: Final answer
    x = 7,230.55

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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.