Home / 11,181.76-15,431.52-9,315.52

Finding the Fourth Proportional to 11,181.76, 15,431.52 and 9,315.52

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Solution

The fourth proportional to 11,181.76, 15,431.52 and 9,315.52 is: 12,855.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,181.76 : 15,431.52 = 9,315.52 : x
  2. Step 2: Convert to fraction form
    11,181.76/15,431.52 = 9,315.52/x
  3. Step 3: Cross multiply
    11,181.76x = 15,431.52 × 9,315.52
  4. Step 4: Simplify right side
    11,181.76x = 143,752,633.19
  5. Step 5: Solve for x
    x = 143,752,633.19/11,181.76
  6. Step 6: Final answer
    x = 12,855.99

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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.