Home / 19,691.28-27,165.96-12,621.84

Finding the Fourth Proportional to 19,691.28, 27,165.96 and 12,621.84

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Solution

The fourth proportional to 19,691.28, 27,165.96 and 12,621.84 is: 17,413.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,691.28 : 27,165.96 = 12,621.84 : x
  2. Step 2: Convert to fraction form
    19,691.28/27,165.96 = 12,621.84/x
  3. Step 3: Cross multiply
    19,691.28x = 27,165.96 × 12,621.84
  4. Step 4: Simplify right side
    19,691.28x = 342,884,400.57
  5. Step 5: Solve for x
    x = 342,884,400.57/19,691.28
  6. Step 6: Final answer
    x = 17,413.01

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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.