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Finding the Fourth Proportional to 13,203.59, 18,220.65 and 7,235.12

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Solution

The fourth proportional to 13,203.59, 18,220.65 and 7,235.12 is: 9,984.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.59 : 18,220.65 = 7,235.12 : x
  2. Step 2: Convert to fraction form
    13,203.59/18,220.65 = 7,235.12/x
  3. Step 3: Cross multiply
    13,203.59x = 18,220.65 × 7,235.12
  4. Step 4: Simplify right side
    13,203.59x = 131,828,498.12
  5. Step 5: Solve for x
    x = 131,828,498.12/13,203.59
  6. Step 6: Final answer
    x = 9,984.30

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Half scale
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Double scale
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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.