Home / 38,651.28-57,981.36-13,686

Finding the Fourth Proportional to 38,651.28, 57,981.36 and 13,686

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Solution

The fourth proportional to 38,651.28, 57,981.36 and 13,686 is: 20,530.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,651.28 : 57,981.36 = 13,686 : x
  2. Step 2: Convert to fraction form
    38,651.28/57,981.36 = 13,686/x
  3. Step 3: Cross multiply
    38,651.28x = 57,981.36 × 13,686
  4. Step 4: Simplify right side
    38,651.28x = 793,532,892.96
  5. Step 5: Solve for x
    x = 793,532,892.96/38,651.28
  6. Step 6: Final answer
    x = 20,530.57

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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.