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Finding the Fourth Proportional to 8,109.70, 12,164.55 and 3,492.70

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Solution

The fourth proportional to 8,109.70, 12,164.55 and 3,492.70 is: 5,239.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,109.70 : 12,164.55 = 3,492.70 : x
  2. Step 2: Convert to fraction form
    8,109.70/12,164.55 = 3,492.70/x
  3. Step 3: Cross multiply
    8,109.70x = 12,164.55 × 3,492.70
  4. Step 4: Simplify right side
    8,109.70x = 42,487,123.79
  5. Step 5: Solve for x
    x = 42,487,123.79/8,109.70
  6. Step 6: Final answer
    x = 5,239.05

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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.