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Finding the Fourth Proportional to 10,221.80, 14,104.86 and 5,745

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Solution

The fourth proportional to 10,221.80, 14,104.86 and 5,745 is: 7,927.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.80 : 14,104.86 = 5,745 : x
  2. Step 2: Convert to fraction form
    10,221.80/14,104.86 = 5,745/x
  3. Step 3: Cross multiply
    10,221.80x = 14,104.86 × 5,745
  4. Step 4: Simplify right side
    10,221.80x = 81,032,420.70
  5. Step 5: Solve for x
    x = 81,032,420.70/10,221.80
  6. Step 6: Final answer
    x = 7,927.41

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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.