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Finding the Fourth Proportional to 19,287.78, 26,622 and 10,909.14

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Solution

The fourth proportional to 19,287.78, 26,622 and 10,909.14 is: 15,057.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,287.78 : 26,622 = 10,909.14 : x
  2. Step 2: Convert to fraction form
    19,287.78/26,622 = 10,909.14/x
  3. Step 3: Cross multiply
    19,287.78x = 26,622 × 10,909.14
  4. Step 4: Simplify right side
    19,287.78x = 290,423,125.08
  5. Step 5: Solve for x
    x = 290,423,125.08/19,287.78
  6. Step 6: Final answer
    x = 15,057.36

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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.