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Finding the Fourth Proportional to 18,612.61, 27,919.08 and 5,465.20

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Solution

The fourth proportional to 18,612.61, 27,919.08 and 5,465.20 is: 8,197.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,612.61 : 27,919.08 = 5,465.20 : x
  2. Step 2: Convert to fraction form
    18,612.61/27,919.08 = 5,465.20/x
  3. Step 3: Cross multiply
    18,612.61x = 27,919.08 × 5,465.20
  4. Step 4: Simplify right side
    18,612.61x = 152,583,356.02
  5. Step 5: Solve for x
    x = 152,583,356.02/18,612.61
  6. Step 6: Final answer
    x = 8,197.85

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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.