Home / 20,123.57-30,129.94-10,214.39

Finding the Fourth Proportional to 20,123.57, 30,129.94 and 10,214.39

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Solution

The fourth proportional to 20,123.57, 30,129.94 and 10,214.39 is: 15,293.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.57 : 30,129.94 = 10,214.39 : x
  2. Step 2: Convert to fraction form
    20,123.57/30,129.94 = 10,214.39/x
  3. Step 3: Cross multiply
    20,123.57x = 30,129.94 × 10,214.39
  4. Step 4: Simplify right side
    20,123.57x = 307,758,957.84
  5. Step 5: Solve for x
    x = 307,758,957.84/20,123.57
  6. Step 6: Final answer
    x = 15,293.46

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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.