Home / 20,868.96-31,286.16-10,492.32

Finding the Fourth Proportional to 20,868.96, 31,286.16 and 10,492.32

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Solution

The fourth proportional to 20,868.96, 31,286.16 and 10,492.32 is: 15,729.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.96 : 31,286.16 = 10,492.32 : x
  2. Step 2: Convert to fraction form
    20,868.96/31,286.16 = 10,492.32/x
  3. Step 3: Cross multiply
    20,868.96x = 31,286.16 × 10,492.32
  4. Step 4: Simplify right side
    20,868.96x = 328,264,402.29
  5. Step 5: Solve for x
    x = 328,264,402.29/20,868.96
  6. Step 6: Final answer
    x = 15,729.79

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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.