Home / 20,717.39-31,070.40-5,720.92

Finding the Fourth Proportional to 20,717.39, 31,070.40 and 5,720.92

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Solution

The fourth proportional to 20,717.39, 31,070.40 and 5,720.92 is: 8,579.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.39 : 31,070.40 = 5,720.92 : x
  2. Step 2: Convert to fraction form
    20,717.39/31,070.40 = 5,720.92/x
  3. Step 3: Cross multiply
    20,717.39x = 31,070.40 × 5,720.92
  4. Step 4: Simplify right side
    20,717.39x = 177,751,272.77
  5. Step 5: Solve for x
    x = 177,751,272.77/20,717.39
  6. Step 6: Final answer
    x = 8,579.81

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1.5x scale

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.