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Finding the Fourth Proportional to 8,821.61, 12,174.06 and 4,992.95

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Solution

The fourth proportional to 8,821.61, 12,174.06 and 4,992.95 is: 6,890.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,821.61 : 12,174.06 = 4,992.95 : x
  2. Step 2: Convert to fraction form
    8,821.61/12,174.06 = 4,992.95/x
  3. Step 3: Cross multiply
    8,821.61x = 12,174.06 × 4,992.95
  4. Step 4: Simplify right side
    8,821.61x = 60,784,412.01
  5. Step 5: Solve for x
    x = 60,784,412.01/8,821.61
  6. Step 6: Final answer
    x = 6,890.40

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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.