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Finding the Fourth Proportional to 8,889.52, 12,260.08 and 6,656.64

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Solution

The fourth proportional to 8,889.52, 12,260.08 and 6,656.64 is: 9,180.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.52 : 12,260.08 = 6,656.64 : x
  2. Step 2: Convert to fraction form
    8,889.52/12,260.08 = 6,656.64/x
  3. Step 3: Cross multiply
    8,889.52x = 12,260.08 × 6,656.64
  4. Step 4: Simplify right side
    8,889.52x = 81,610,938.93
  5. Step 5: Solve for x
    x = 81,610,938.93/8,889.52
  6. Step 6: Final answer
    x = 9,180.58

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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.