Home / 12,739.56-17,580.66-7,150.56

Finding the Fourth Proportional to 12,739.56, 17,580.66 and 7,150.56

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Solution

The fourth proportional to 12,739.56, 17,580.66 and 7,150.56 is: 9,867.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.56 : 17,580.66 = 7,150.56 : x
  2. Step 2: Convert to fraction form
    12,739.56/17,580.66 = 7,150.56/x
  3. Step 3: Cross multiply
    12,739.56x = 17,580.66 × 7,150.56
  4. Step 4: Simplify right side
    12,739.56x = 125,711,564.17
  5. Step 5: Solve for x
    x = 125,711,564.17/12,739.56
  6. Step 6: Final answer
    x = 9,867.81

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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.