Home / 11,147.58-15,380.55-8,782.38

Finding the Fourth Proportional to 11,147.58, 15,380.55 and 8,782.38

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Solution

The fourth proportional to 11,147.58, 15,380.55 and 8,782.38 is: 12,117.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,147.58 : 15,380.55 = 8,782.38 : x
  2. Step 2: Convert to fraction form
    11,147.58/15,380.55 = 8,782.38/x
  3. Step 3: Cross multiply
    11,147.58x = 15,380.55 × 8,782.38
  4. Step 4: Simplify right side
    11,147.58x = 135,077,834.71
  5. Step 5: Solve for x
    x = 135,077,834.71/11,147.58
  6. Step 6: Final answer
    x = 12,117.23

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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.