Home / 20,999.90-31,504.30-6,959.14

Finding the Fourth Proportional to 20,999.90, 31,504.30 and 6,959.14

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Solution

The fourth proportional to 20,999.90, 31,504.30 and 6,959.14 is: 10,440.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.90 : 31,504.30 = 6,959.14 : x
  2. Step 2: Convert to fraction form
    20,999.90/31,504.30 = 6,959.14/x
  3. Step 3: Cross multiply
    20,999.90x = 31,504.30 × 6,959.14
  4. Step 4: Simplify right side
    20,999.90x = 219,242,834.30
  5. Step 5: Solve for x
    x = 219,242,834.30/20,999.90
  6. Step 6: Final answer
    x = 10,440.18

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1.5x scale

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.