Home / 11,078.40-15,284.32-7,101.70

Finding the Fourth Proportional to 11,078.40, 15,284.32 and 7,101.70

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Solution

The fourth proportional to 11,078.40, 15,284.32 and 7,101.70 is: 9,797.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,078.40 : 15,284.32 = 7,101.70 : x
  2. Step 2: Convert to fraction form
    11,078.40/15,284.32 = 7,101.70/x
  3. Step 3: Cross multiply
    11,078.40x = 15,284.32 × 7,101.70
  4. Step 4: Simplify right side
    11,078.40x = 108,544,655.34
  5. Step 5: Solve for x
    x = 108,544,655.34/11,078.40
  6. Step 6: Final answer
    x = 9,797.86

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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.