Home / 15,686.82-21,626.87-13,439.07

Finding the Fourth Proportional to 15,686.82, 21,626.87 and 13,439.07

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Solution

The fourth proportional to 15,686.82, 21,626.87 and 13,439.07 is: 18,527.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.82 : 21,626.87 = 13,439.07 : x
  2. Step 2: Convert to fraction form
    15,686.82/21,626.87 = 13,439.07/x
  3. Step 3: Cross multiply
    15,686.82x = 21,626.87 × 13,439.07
  4. Step 4: Simplify right side
    15,686.82x = 290,644,952.62
  5. Step 5: Solve for x
    x = 290,644,952.62/15,686.82
  6. Step 6: Final answer
    x = 18,527.97

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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.