Home / 6,439.20-9,637.20-5,661.60

Finding the Fourth Proportional to 6,439.20, 9,637.20 and 5,661.60

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Solution

The fourth proportional to 6,439.20, 9,637.20 and 5,661.60 is: 8,473.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.20 : 9,637.20 = 5,661.60 : x
  2. Step 2: Convert to fraction form
    6,439.20/9,637.20 = 5,661.60/x
  3. Step 3: Cross multiply
    6,439.20x = 9,637.20 × 5,661.60
  4. Step 4: Simplify right side
    6,439.20x = 54,561,971.52
  5. Step 5: Solve for x
    x = 54,561,971.52/6,439.20
  6. Step 6: Final answer
    x = 8,473.41

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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.