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Finding the Fourth Proportional to 19,671.61, 27,138.18 and 13,295.87

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Solution

The fourth proportional to 19,671.61, 27,138.18 and 13,295.87 is: 18,342.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,671.61 : 27,138.18 = 13,295.87 : x
  2. Step 2: Convert to fraction form
    19,671.61/27,138.18 = 13,295.87/x
  3. Step 3: Cross multiply
    19,671.61x = 27,138.18 × 13,295.87
  4. Step 4: Simplify right side
    19,671.61x = 360,825,713.32
  5. Step 5: Solve for x
    x = 360,825,713.32/19,671.61
  6. Step 6: Final answer
    x = 18,342.46

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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.