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Finding the Fourth Proportional to 13,203.15, 18,220.85 and 7,235.34

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Solution

The fourth proportional to 13,203.15, 18,220.85 and 7,235.34 is: 9,985.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.15 : 18,220.85 = 7,235.34 : x
  2. Step 2: Convert to fraction form
    13,203.15/18,220.85 = 7,235.34/x
  3. Step 3: Cross multiply
    13,203.15x = 18,220.85 × 7,235.34
  4. Step 4: Simplify right side
    13,203.15x = 131,834,044.84
  5. Step 5: Solve for x
    x = 131,834,044.84/13,203.15
  6. Step 6: Final answer
    x = 9,985.04

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Half scale
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Double scale
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Similar ratio
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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.