Home / 8,172.11-11,258.07-7,681.58

Finding the Fourth Proportional to 8,172.11, 11,258.07 and 7,681.58

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Solution

The fourth proportional to 8,172.11, 11,258.07 and 7,681.58 is: 10,582.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,172.11 : 11,258.07 = 7,681.58 : x
  2. Step 2: Convert to fraction form
    8,172.11/11,258.07 = 7,681.58/x
  3. Step 3: Cross multiply
    8,172.11x = 11,258.07 × 7,681.58
  4. Step 4: Simplify right side
    8,172.11x = 86,479,709.06
  5. Step 5: Solve for x
    x = 86,479,709.06/8,172.11
  6. Step 6: Final answer
    x = 10,582.31

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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.