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Finding the Fourth Proportional to 12,798.56, 17,655.28 and 8,812.76

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Solution

The fourth proportional to 12,798.56, 17,655.28 and 8,812.76 is: 12,156.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,798.56 : 17,655.28 = 8,812.76 : x
  2. Step 2: Convert to fraction form
    12,798.56/17,655.28 = 8,812.76/x
  3. Step 3: Cross multiply
    12,798.56x = 17,655.28 × 8,812.76
  4. Step 4: Simplify right side
    12,798.56x = 155,591,745.37
  5. Step 5: Solve for x
    x = 155,591,745.37/12,798.56
  6. Step 6: Final answer
    x = 12,156.97

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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.