Home / 15,219.69-21,003.30-8,505.60

Finding the Fourth Proportional to 15,219.69, 21,003.30 and 8,505.60

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Solution

The fourth proportional to 15,219.69, 21,003.30 and 8,505.60 is: 11,737.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,219.69 : 21,003.30 = 8,505.60 : x
  2. Step 2: Convert to fraction form
    15,219.69/21,003.30 = 8,505.60/x
  3. Step 3: Cross multiply
    15,219.69x = 21,003.30 × 8,505.60
  4. Step 4: Simplify right side
    15,219.69x = 178,645,668.48
  5. Step 5: Solve for x
    x = 178,645,668.48/15,219.69
  6. Step 6: Final answer
    x = 11,737.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.