Home / 20,123.10-30,189.78-10,262.16

Finding the Fourth Proportional to 20,123.10, 30,189.78 and 10,262.16

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Solution

The fourth proportional to 20,123.10, 30,189.78 and 10,262.16 is: 15,395.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.10 : 30,189.78 = 10,262.16 : x
  2. Step 2: Convert to fraction form
    20,123.10/30,189.78 = 10,262.16/x
  3. Step 3: Cross multiply
    20,123.10x = 30,189.78 × 10,262.16
  4. Step 4: Simplify right side
    20,123.10x = 309,812,352.72
  5. Step 5: Solve for x
    x = 309,812,352.72/20,123.10
  6. Step 6: Final answer
    x = 15,395.86

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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.