Home / 20,999.88-31,478.04-11,136.60

Finding the Fourth Proportional to 20,999.88, 31,478.04 and 11,136.60

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Solution

The fourth proportional to 20,999.88, 31,478.04 and 11,136.60 is: 16,693.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,999.88 : 31,478.04 = 11,136.60 : x
  2. Step 2: Convert to fraction form
    20,999.88/31,478.04 = 11,136.60/x
  3. Step 3: Cross multiply
    20,999.88x = 31,478.04 × 11,136.60
  4. Step 4: Simplify right side
    20,999.88x = 350,558,340.26
  5. Step 5: Solve for x
    x = 350,558,340.26/20,999.88
  6. Step 6: Final answer
    x = 16,693.35

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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.