Home / 4,727.20-7,090.80-4,257.40

Finding the Fourth Proportional to 4,727.20, 7,090.80 and 4,257.40

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Solution

The fourth proportional to 4,727.20, 7,090.80 and 4,257.40 is: 6,386.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,727.20 : 7,090.80 = 4,257.40 : x
  2. Step 2: Convert to fraction form
    4,727.20/7,090.80 = 4,257.40/x
  3. Step 3: Cross multiply
    4,727.20x = 7,090.80 × 4,257.40
  4. Step 4: Simplify right side
    4,727.20x = 30,188,371.92
  5. Step 5: Solve for x
    x = 30,188,371.92/4,727.20
  6. Step 6: Final answer
    x = 6,386.10

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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.