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Finding the Fourth Proportional to 19,686.80, 27,167.80 and 10,734.32

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Solution

The fourth proportional to 19,686.80, 27,167.80 and 10,734.32 is: 14,813.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,686.80 : 27,167.80 = 10,734.32 : x
  2. Step 2: Convert to fraction form
    19,686.80/27,167.80 = 10,734.32/x
  3. Step 3: Cross multiply
    19,686.80x = 27,167.80 × 10,734.32
  4. Step 4: Simplify right side
    19,686.80x = 291,627,858.90
  5. Step 5: Solve for x
    x = 291,627,858.90/19,686.80
  6. Step 6: Final answer
    x = 14,813.37

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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.