Home / 20,708.87-31,005.59-17,719.49

Finding the Fourth Proportional to 20,708.87, 31,005.59 and 17,719.49

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Solution

The fourth proportional to 20,708.87, 31,005.59 and 17,719.49 is: 26,529.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.87 : 31,005.59 = 17,719.49 : x
  2. Step 2: Convert to fraction form
    20,708.87/31,005.59 = 17,719.49/x
  3. Step 3: Cross multiply
    20,708.87x = 31,005.59 × 17,719.49
  4. Step 4: Simplify right side
    20,708.87x = 549,403,230.87
  5. Step 5: Solve for x
    x = 549,403,230.87/20,708.87
  6. Step 6: Final answer
    x = 26,529.86

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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.