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Finding the Fourth Proportional to 10,893.80, 15,018.50 and 9,786.68

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Solution

The fourth proportional to 10,893.80, 15,018.50 and 9,786.68 is: 13,492.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,893.80 : 15,018.50 = 9,786.68 : x
  2. Step 2: Convert to fraction form
    10,893.80/15,018.50 = 9,786.68/x
  3. Step 3: Cross multiply
    10,893.80x = 15,018.50 × 9,786.68
  4. Step 4: Simplify right side
    10,893.80x = 146,981,253.58
  5. Step 5: Solve for x
    x = 146,981,253.58/10,893.80
  6. Step 6: Final answer
    x = 13,492.19

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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.