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Finding the Fourth Proportional to 8,631.93, 12,920.05 and 4,466.21

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Solution

The fourth proportional to 8,631.93, 12,920.05 and 4,466.21 is: 6,684.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631.93 : 12,920.05 = 4,466.21 : x
  2. Step 2: Convert to fraction form
    8,631.93/12,920.05 = 4,466.21/x
  3. Step 3: Cross multiply
    8,631.93x = 12,920.05 × 4,466.21
  4. Step 4: Simplify right side
    8,631.93x = 57,703,580.74
  5. Step 5: Solve for x
    x = 57,703,580.74/8,631.93
  6. Step 6: Final answer
    x = 6,684.90

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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.