Home / 8,688.06-11,986.38-5,705.51

Finding the Fourth Proportional to 8,688.06, 11,986.38 and 5,705.51

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Solution

The fourth proportional to 8,688.06, 11,986.38 and 5,705.51 is: 7,871.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.06 : 11,986.38 = 5,705.51 : x
  2. Step 2: Convert to fraction form
    8,688.06/11,986.38 = 5,705.51/x
  3. Step 3: Cross multiply
    8,688.06x = 11,986.38 × 5,705.51
  4. Step 4: Simplify right side
    8,688.06x = 68,388,351.02
  5. Step 5: Solve for x
    x = 68,388,351.02/8,688.06
  6. Step 6: Final answer
    x = 7,871.53

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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.