Home / 11,228.76-15,479.28-7,860.96

Finding the Fourth Proportional to 11,228.76, 15,479.28 and 7,860.96

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Solution

The fourth proportional to 11,228.76, 15,479.28 and 7,860.96 is: 10,836.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,228.76 : 15,479.28 = 7,860.96 : x
  2. Step 2: Convert to fraction form
    11,228.76/15,479.28 = 7,860.96/x
  3. Step 3: Cross multiply
    11,228.76x = 15,479.28 × 7,860.96
  4. Step 4: Simplify right side
    11,228.76x = 121,682,000.91
  5. Step 5: Solve for x
    x = 121,682,000.91/11,228.76
  6. Step 6: Final answer
    x = 10,836.64

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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.