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Finding the Fourth Proportional to 8,688.04, 11,978.22 and 5,538.76

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Solution

The fourth proportional to 8,688.04, 11,978.22 and 5,538.76 is: 7,636.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.04 : 11,978.22 = 5,538.76 : x
  2. Step 2: Convert to fraction form
    8,688.04/11,978.22 = 5,538.76/x
  3. Step 3: Cross multiply
    8,688.04x = 11,978.22 × 5,538.76
  4. Step 4: Simplify right side
    8,688.04x = 66,344,485.81
  5. Step 5: Solve for x
    x = 66,344,485.81/8,688.04
  6. Step 6: Final answer
    x = 7,636.30

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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.