Home / 20,487.79-30,731.55-11,716.48

Finding the Fourth Proportional to 20,487.79, 30,731.55 and 11,716.48

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Solution

The fourth proportional to 20,487.79, 30,731.55 and 11,716.48 is: 17,574.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.79 : 30,731.55 = 11,716.48 : x
  2. Step 2: Convert to fraction form
    20,487.79/30,731.55 = 11,716.48/x
  3. Step 3: Cross multiply
    20,487.79x = 30,731.55 × 11,716.48
  4. Step 4: Simplify right side
    20,487.79x = 360,065,590.94
  5. Step 5: Solve for x
    x = 360,065,590.94/20,487.79
  6. Step 6: Final answer
    x = 17,574.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.