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Finding the Fourth Proportional to 11,061.80, 16,581.90 and 9,895.40

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Solution

The fourth proportional to 11,061.80, 16,581.90 and 9,895.40 is: 14,833.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,061.80 : 16,581.90 = 9,895.40 : x
  2. Step 2: Convert to fraction form
    11,061.80/16,581.90 = 9,895.40/x
  3. Step 3: Cross multiply
    11,061.80x = 16,581.90 × 9,895.40
  4. Step 4: Simplify right side
    11,061.80x = 164,084,533.26
  5. Step 5: Solve for x
    x = 164,084,533.26/11,061.80
  6. Step 6: Final answer
    x = 14,833.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.