Home / 20,719.70-28,739.69-19,972.50

Finding the Fourth Proportional to 20,719.70, 28,739.69 and 19,972.50

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Solution

The fourth proportional to 20,719.70, 28,739.69 and 19,972.50 is: 27,703.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.70 : 28,739.69 = 19,972.50 : x
  2. Step 2: Convert to fraction form
    20,719.70/28,739.69 = 19,972.50/x
  3. Step 3: Cross multiply
    20,719.70x = 28,739.69 × 19,972.50
  4. Step 4: Simplify right side
    20,719.70x = 574,003,458.53
  5. Step 5: Solve for x
    x = 574,003,458.53/20,719.70
  6. Step 6: Final answer
    x = 27,703.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.