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Finding the Fourth Proportional to 8,809.40, 12,147.90 and 6,155.84

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Solution

The fourth proportional to 8,809.40, 12,147.90 and 6,155.84 is: 8,488.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809.40 : 12,147.90 = 6,155.84 : x
  2. Step 2: Convert to fraction form
    8,809.40/12,147.90 = 6,155.84/x
  3. Step 3: Cross multiply
    8,809.40x = 12,147.90 × 6,155.84
  4. Step 4: Simplify right side
    8,809.40x = 74,780,528.74
  5. Step 5: Solve for x
    x = 74,780,528.74/8,809.40
  6. Step 6: Final answer
    x = 8,488.72

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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.