Home / 21,220.90-31,834.70-6,984.92

Finding the Fourth Proportional to 21,220.90, 31,834.70 and 6,984.92

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Solution

The fourth proportional to 21,220.90, 31,834.70 and 6,984.92 is: 10,478.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.90 : 31,834.70 = 6,984.92 : x
  2. Step 2: Convert to fraction form
    21,220.90/31,834.70 = 6,984.92/x
  3. Step 3: Cross multiply
    21,220.90x = 31,834.70 × 6,984.92
  4. Step 4: Simplify right side
    21,220.90x = 222,362,797.80
  5. Step 5: Solve for x
    x = 222,362,797.80/21,220.90
  6. Step 6: Final answer
    x = 10,478.48

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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.