Home / 7,991.28-11,019.30-5,440.68

Finding the Fourth Proportional to 7,991.28, 11,019.30 and 5,440.68

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Solution

The fourth proportional to 7,991.28, 11,019.30 and 5,440.68 is: 7,502.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.28 : 11,019.30 = 5,440.68 : x
  2. Step 2: Convert to fraction form
    7,991.28/11,019.30 = 5,440.68/x
  3. Step 3: Cross multiply
    7,991.28x = 11,019.30 × 5,440.68
  4. Step 4: Simplify right side
    7,991.28x = 59,952,485.12
  5. Step 5: Solve for x
    x = 59,952,485.12/7,991.28
  6. Step 6: Final answer
    x = 7,502.24

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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.