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Finding the Fourth Proportional to 19,282.40, 28,934.40 and 8,187.20

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Solution

The fourth proportional to 19,282.40, 28,934.40 and 8,187.20 is: 12,285.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,282.40 : 28,934.40 = 8,187.20 : x
  2. Step 2: Convert to fraction form
    19,282.40/28,934.40 = 8,187.20/x
  3. Step 3: Cross multiply
    19,282.40x = 28,934.40 × 8,187.20
  4. Step 4: Simplify right side
    19,282.40x = 236,891,719.68
  5. Step 5: Solve for x
    x = 236,891,719.68/19,282.40
  6. Step 6: Final answer
    x = 12,285.39

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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.