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Finding the Fourth Proportional to 8,218.76, 12,329.42 and 4,931.08

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Solution

The fourth proportional to 8,218.76, 12,329.42 and 4,931.08 is: 7,397.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,218.76 : 12,329.42 = 4,931.08 : x
  2. Step 2: Convert to fraction form
    8,218.76/12,329.42 = 4,931.08/x
  3. Step 3: Cross multiply
    8,218.76x = 12,329.42 × 4,931.08
  4. Step 4: Simplify right side
    8,218.76x = 60,797,356.37
  5. Step 5: Solve for x
    x = 60,797,356.37/8,218.76
  6. Step 6: Final answer
    x = 7,397.39

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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.