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Finding the Fourth Proportional to 11,220.30, 16,830.45 and 10,572.30

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Solution

The fourth proportional to 11,220.30, 16,830.45 and 10,572.30 is: 15,858.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.30 : 16,830.45 = 10,572.30 : x
  2. Step 2: Convert to fraction form
    11,220.30/16,830.45 = 10,572.30/x
  3. Step 3: Cross multiply
    11,220.30x = 16,830.45 × 10,572.30
  4. Step 4: Simplify right side
    11,220.30x = 177,936,566.54
  5. Step 5: Solve for x
    x = 177,936,566.54/11,220.30
  6. Step 6: Final answer
    x = 15,858.45

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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.