Home / 20,502.18-30,774.33-10,638.81

Finding the Fourth Proportional to 20,502.18, 30,774.33 and 10,638.81

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Solution

The fourth proportional to 20,502.18, 30,774.33 and 10,638.81 is: 15,969.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,502.18 : 30,774.33 = 10,638.81 : x
  2. Step 2: Convert to fraction form
    20,502.18/30,774.33 = 10,638.81/x
  3. Step 3: Cross multiply
    20,502.18x = 30,774.33 × 10,638.81
  4. Step 4: Simplify right side
    20,502.18x = 327,402,249.75
  5. Step 5: Solve for x
    x = 327,402,249.75/20,502.18
  6. Step 6: Final answer
    x = 15,969.14

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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.