Home / 11,367.12-15,688.64-7,121.82

Finding the Fourth Proportional to 11,367.12, 15,688.64 and 7,121.82

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Solution

The fourth proportional to 11,367.12, 15,688.64 and 7,121.82 is: 9,829.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,367.12 : 15,688.64 = 7,121.82 : x
  2. Step 2: Convert to fraction form
    11,367.12/15,688.64 = 7,121.82/x
  3. Step 3: Cross multiply
    11,367.12x = 15,688.64 × 7,121.82
  4. Step 4: Simplify right side
    11,367.12x = 111,731,733.20
  5. Step 5: Solve for x
    x = 111,731,733.20/11,367.12
  6. Step 6: Final answer
    x = 9,829.38

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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.