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Finding the Fourth Proportional to 8,818.50, 12,081.48 and 8,486.40

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Solution

The fourth proportional to 8,818.50, 12,081.48 and 8,486.40 is: 11,626.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,818.50 : 12,081.48 = 8,486.40 : x
  2. Step 2: Convert to fraction form
    8,818.50/12,081.48 = 8,486.40/x
  3. Step 3: Cross multiply
    8,818.50x = 12,081.48 × 8,486.40
  4. Step 4: Simplify right side
    8,818.50x = 102,528,271.87
  5. Step 5: Solve for x
    x = 102,528,271.87/8,818.50
  6. Step 6: Final answer
    x = 11,626.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.