Home / 11,155.33-15,390.11-7,122.31

Finding the Fourth Proportional to 11,155.33, 15,390.11 and 7,122.31

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Solution

The fourth proportional to 11,155.33, 15,390.11 and 7,122.31 is: 9,826.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155.33 : 15,390.11 = 7,122.31 : x
  2. Step 2: Convert to fraction form
    11,155.33/15,390.11 = 7,122.31/x
  3. Step 3: Cross multiply
    11,155.33x = 15,390.11 × 7,122.31
  4. Step 4: Simplify right side
    11,155.33x = 109,613,134.35
  5. Step 5: Solve for x
    x = 109,613,134.35/11,155.33
  6. Step 6: Final answer
    x = 9,826.08

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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.