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Finding the Fourth Proportional to 8,819.99, 13,182.23 and 8,119.47

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Solution

The fourth proportional to 8,819.99, 13,182.23 and 8,119.47 is: 12,135.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,819.99 : 13,182.23 = 8,119.47 : x
  2. Step 2: Convert to fraction form
    8,819.99/13,182.23 = 8,119.47/x
  3. Step 3: Cross multiply
    8,819.99x = 13,182.23 × 8,119.47
  4. Step 4: Simplify right side
    8,819.99x = 107,032,680.42
  5. Step 5: Solve for x
    x = 107,032,680.42/8,819.99
  6. Step 6: Final answer
    x = 12,135.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.