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Finding the Fourth Proportional to 19,366.80, 26,721 and 10,983.12

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Solution

The fourth proportional to 19,366.80, 26,721 and 10,983.12 is: 15,153.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,366.80 : 26,721 = 10,983.12 : x
  2. Step 2: Convert to fraction form
    19,366.80/26,721 = 10,983.12/x
  3. Step 3: Cross multiply
    19,366.80x = 26,721 × 10,983.12
  4. Step 4: Simplify right side
    19,366.80x = 293,479,949.52
  5. Step 5: Solve for x
    x = 293,479,949.52/19,366.80
  6. Step 6: Final answer
    x = 15,153.77

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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.