Home / 5,107.20-7,660.80-4,287.09

Finding the Fourth Proportional to 5,107.20, 7,660.80 and 4,287.09

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Solution

The fourth proportional to 5,107.20, 7,660.80 and 4,287.09 is: 6,430.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,107.20 : 7,660.80 = 4,287.09 : x
  2. Step 2: Convert to fraction form
    5,107.20/7,660.80 = 4,287.09/x
  3. Step 3: Cross multiply
    5,107.20x = 7,660.80 × 4,287.09
  4. Step 4: Simplify right side
    5,107.20x = 32,842,539.07
  5. Step 5: Solve for x
    x = 32,842,539.07/5,107.20
  6. Step 6: Final answer
    x = 6,430.64

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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.