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Finding the Fourth Proportional to 9,339.88, 12,878.50 and 9,124.84

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Solution

The fourth proportional to 9,339.88, 12,878.50 and 9,124.84 is: 12,581.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.88 : 12,878.50 = 9,124.84 : x
  2. Step 2: Convert to fraction form
    9,339.88/12,878.50 = 9,124.84/x
  3. Step 3: Cross multiply
    9,339.88x = 12,878.50 × 9,124.84
  4. Step 4: Simplify right side
    9,339.88x = 117,514,251.94
  5. Step 5: Solve for x
    x = 117,514,251.94/9,339.88
  6. Step 6: Final answer
    x = 12,581.99

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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.