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Finding the Fourth Proportional to 8,786.66, 12,122.19 and 5,423.63

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Solution

The fourth proportional to 8,786.66, 12,122.19 and 5,423.63 is: 7,482.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,786.66 : 12,122.19 = 5,423.63 : x
  2. Step 2: Convert to fraction form
    8,786.66/12,122.19 = 5,423.63/x
  3. Step 3: Cross multiply
    8,786.66x = 12,122.19 × 5,423.63
  4. Step 4: Simplify right side
    8,786.66x = 65,746,212.74
  5. Step 5: Solve for x
    x = 65,746,212.74/8,786.66
  6. Step 6: Final answer
    x = 7,482.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.