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Finding the Fourth Proportional to 8,889.92, 12,273.12 and 7,905.60

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Solution

The fourth proportional to 8,889.92, 12,273.12 and 7,905.60 is: 10,914.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.92 : 12,273.12 = 7,905.60 : x
  2. Step 2: Convert to fraction form
    8,889.92/12,273.12 = 7,905.60/x
  3. Step 3: Cross multiply
    8,889.92x = 12,273.12 × 7,905.60
  4. Step 4: Simplify right side
    8,889.92x = 97,026,377.47
  5. Step 5: Solve for x
    x = 97,026,377.47/8,889.92
  6. Step 6: Final answer
    x = 10,914.20

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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.