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Finding the Fourth Proportional to 8,989.56, 13,482.72 and 6,381.90

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Solution

The fourth proportional to 8,989.56, 13,482.72 and 6,381.90 is: 9,571.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.56 : 13,482.72 = 6,381.90 : x
  2. Step 2: Convert to fraction form
    8,989.56/13,482.72 = 6,381.90/x
  3. Step 3: Cross multiply
    8,989.56x = 13,482.72 × 6,381.90
  4. Step 4: Simplify right side
    8,989.56x = 86,045,370.77
  5. Step 5: Solve for x
    x = 86,045,370.77/8,989.56
  6. Step 6: Final answer
    x = 9,571.70

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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.