Home / 11,148.78-15,372.59-8,909.12

Finding the Fourth Proportional to 11,148.78, 15,372.59 and 8,909.12

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Solution

The fourth proportional to 11,148.78, 15,372.59 and 8,909.12 is: 12,284.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,148.78 : 15,372.59 = 8,909.12 : x
  2. Step 2: Convert to fraction form
    11,148.78/15,372.59 = 8,909.12/x
  3. Step 3: Cross multiply
    11,148.78x = 15,372.59 × 8,909.12
  4. Step 4: Simplify right side
    11,148.78x = 136,956,249.02
  5. Step 5: Solve for x
    x = 136,956,249.02/11,148.78
  6. Step 6: Final answer
    x = 12,284.42

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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.