Home / 6,421.60-8,862.78-3,770.20

Finding the Fourth Proportional to 6,421.60, 8,862.78 and 3,770.20

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Solution

The fourth proportional to 6,421.60, 8,862.78 and 3,770.20 is: 5,203.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.60 : 8,862.78 = 3,770.20 : x
  2. Step 2: Convert to fraction form
    6,421.60/8,862.78 = 3,770.20/x
  3. Step 3: Cross multiply
    6,421.60x = 8,862.78 × 3,770.20
  4. Step 4: Simplify right side
    6,421.60x = 33,414,453.16
  5. Step 5: Solve for x
    x = 33,414,453.16/6,421.60
  6. Step 6: Final answer
    x = 5,203.45

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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.