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Finding the Fourth Proportional to 6,429.60, 8,869.80 and 3,740.80

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Solution

The fourth proportional to 6,429.60, 8,869.80 and 3,740.80 is: 5,160.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,429.60 : 8,869.80 = 3,740.80 : x
  2. Step 2: Convert to fraction form
    6,429.60/8,869.80 = 3,740.80/x
  3. Step 3: Cross multiply
    6,429.60x = 8,869.80 × 3,740.80
  4. Step 4: Simplify right side
    6,429.60x = 33,180,147.84
  5. Step 5: Solve for x
    x = 33,180,147.84/6,429.60
  6. Step 6: Final answer
    x = 5,160.53

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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.