Home / 11,355.93-15,668.78-7,161.75

Finding the Fourth Proportional to 11,355.93, 15,668.78 and 7,161.75

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Solution

The fourth proportional to 11,355.93, 15,668.78 and 7,161.75 is: 9,881.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.93 : 15,668.78 = 7,161.75 : x
  2. Step 2: Convert to fraction form
    11,355.93/15,668.78 = 7,161.75/x
  3. Step 3: Cross multiply
    11,355.93x = 15,668.78 × 7,161.75
  4. Step 4: Simplify right side
    11,355.93x = 112,215,849.36
  5. Step 5: Solve for x
    x = 112,215,849.36/11,355.93
  6. Step 6: Final answer
    x = 9,881.70

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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.