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Finding the Fourth Proportional to 8,989.79, 13,484.07 and 8,381.07

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Solution

The fourth proportional to 8,989.79, 13,484.07 and 8,381.07 is: 12,571.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.79 : 13,484.07 = 8,381.07 : x
  2. Step 2: Convert to fraction form
    8,989.79/13,484.07 = 8,381.07/x
  3. Step 3: Cross multiply
    8,989.79x = 13,484.07 × 8,381.07
  4. Step 4: Simplify right side
    8,989.79x = 113,010,934.55
  5. Step 5: Solve for x
    x = 113,010,934.55/8,989.79
  6. Step 6: Final answer
    x = 12,571.04

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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.