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Finding the Fourth Proportional to 18,782.40, 28,175.04 and 8,395.20

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Solution

The fourth proportional to 18,782.40, 28,175.04 and 8,395.20 is: 12,593.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.40 : 28,175.04 = 8,395.20 : x
  2. Step 2: Convert to fraction form
    18,782.40/28,175.04 = 8,395.20/x
  3. Step 3: Cross multiply
    18,782.40x = 28,175.04 × 8,395.20
  4. Step 4: Simplify right side
    18,782.40x = 236,535,095.81
  5. Step 5: Solve for x
    x = 236,535,095.81/18,782.40
  6. Step 6: Final answer
    x = 12,593.44

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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.