Home / 20,981.08-31,464.13-6,938.52

Finding the Fourth Proportional to 20,981.08, 31,464.13 and 6,938.52

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Solution

The fourth proportional to 20,981.08, 31,464.13 and 6,938.52 is: 10,405.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.08 : 31,464.13 = 6,938.52 : x
  2. Step 2: Convert to fraction form
    20,981.08/31,464.13 = 6,938.52/x
  3. Step 3: Cross multiply
    20,981.08x = 31,464.13 × 6,938.52
  4. Step 4: Simplify right side
    20,981.08x = 218,314,495.29
  5. Step 5: Solve for x
    x = 218,314,495.29/20,981.08
  6. Step 6: Final answer
    x = 10,405.30

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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.