Home / 20,139.64-30,207-10,286.02

Finding the Fourth Proportional to 20,139.64, 30,207 and 10,286.02

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Solution

The fourth proportional to 20,139.64, 30,207 and 10,286.02 is: 15,427.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.64 : 30,207 = 10,286.02 : x
  2. Step 2: Convert to fraction form
    20,139.64/30,207 = 10,286.02/x
  3. Step 3: Cross multiply
    20,139.64x = 30,207 × 10,286.02
  4. Step 4: Simplify right side
    20,139.64x = 310,709,806.14
  5. Step 5: Solve for x
    x = 310,709,806.14/20,139.64
  6. Step 6: Final answer
    x = 15,427.77

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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.