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Finding the Fourth Proportional to 10,858.80, 14,940.60 and 10,167.60

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Solution

The fourth proportional to 10,858.80, 14,940.60 and 10,167.60 is: 13,989.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,858.80 : 14,940.60 = 10,167.60 : x
  2. Step 2: Convert to fraction form
    10,858.80/14,940.60 = 10,167.60/x
  3. Step 3: Cross multiply
    10,858.80x = 14,940.60 × 10,167.60
  4. Step 4: Simplify right side
    10,858.80x = 151,910,044.56
  5. Step 5: Solve for x
    x = 151,910,044.56/10,858.80
  6. Step 6: Final answer
    x = 13,989.58

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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.