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Finding the Fourth Proportional to 19,287.76, 26,622 and 10,909.12

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Solution

The fourth proportional to 19,287.76, 26,622 and 10,909.12 is: 15,057.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,287.76 : 26,622 = 10,909.12 : x
  2. Step 2: Convert to fraction form
    19,287.76/26,622 = 10,909.12/x
  3. Step 3: Cross multiply
    19,287.76x = 26,622 × 10,909.12
  4. Step 4: Simplify right side
    19,287.76x = 290,422,592.64
  5. Step 5: Solve for x
    x = 290,422,592.64/19,287.76
  6. Step 6: Final answer
    x = 15,057.35

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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.