Home / 20,911.42-31,360.50-6,868.18

Finding the Fourth Proportional to 20,911.42, 31,360.50 and 6,868.18

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Solution

The fourth proportional to 20,911.42, 31,360.50 and 6,868.18 is: 10,300.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.42 : 31,360.50 = 6,868.18 : x
  2. Step 2: Convert to fraction form
    20,911.42/31,360.50 = 6,868.18/x
  3. Step 3: Cross multiply
    20,911.42x = 31,360.50 × 6,868.18
  4. Step 4: Simplify right side
    20,911.42x = 215,389,539.50
  5. Step 5: Solve for x
    x = 215,389,539.50/20,911.42
  6. Step 6: Final answer
    x = 10,300.09

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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.