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Finding the Fourth Proportional to 19,989.68, 27,589.08 and 19,103.92

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Solution

The fourth proportional to 19,989.68, 27,589.08 and 19,103.92 is: 26,366.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989.68 : 27,589.08 = 19,103.92 : x
  2. Step 2: Convert to fraction form
    19,989.68/27,589.08 = 19,103.92/x
  3. Step 3: Cross multiply
    19,989.68x = 27,589.08 × 19,103.92
  4. Step 4: Simplify right side
    19,989.68x = 527,059,577.19
  5. Step 5: Solve for x
    x = 527,059,577.19/19,989.68
  6. Step 6: Final answer
    x = 26,366.58

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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.