Home / 6,420.24-9,630.60-3,970.80

Finding the Fourth Proportional to 6,420.24, 9,630.60 and 3,970.80

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Solution

The fourth proportional to 6,420.24, 9,630.60 and 3,970.80 is: 5,956.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.24 : 9,630.60 = 3,970.80 : x
  2. Step 2: Convert to fraction form
    6,420.24/9,630.60 = 3,970.80/x
  3. Step 3: Cross multiply
    6,420.24x = 9,630.60 × 3,970.80
  4. Step 4: Simplify right side
    6,420.24x = 38,241,186.48
  5. Step 5: Solve for x
    x = 38,241,186.48/6,420.24
  6. Step 6: Final answer
    x = 5,956.35

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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.