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Finding the Fourth Proportional to 13,216.56, 18,238.98 and 7,248.78

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Solution

The fourth proportional to 13,216.56, 18,238.98 and 7,248.78 is: 10,003.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,216.56 : 18,238.98 = 7,248.78 : x
  2. Step 2: Convert to fraction form
    13,216.56/18,238.98 = 7,248.78/x
  3. Step 3: Cross multiply
    13,216.56x = 18,238.98 × 7,248.78
  4. Step 4: Simplify right side
    13,216.56x = 132,210,353.44
  5. Step 5: Solve for x
    x = 132,210,353.44/13,216.56
  6. Step 6: Final answer
    x = 10,003.39

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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.