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Finding the Fourth Proportional to 8,640.16, 11,924.56 and 4,913.44

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Solution

The fourth proportional to 8,640.16, 11,924.56 and 4,913.44 is: 6,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.16 : 11,924.56 = 4,913.44 : x
  2. Step 2: Convert to fraction form
    8,640.16/11,924.56 = 4,913.44/x
  3. Step 3: Cross multiply
    8,640.16x = 11,924.56 × 4,913.44
  4. Step 4: Simplify right side
    8,640.16x = 58,590,610.09
  5. Step 5: Solve for x
    x = 58,590,610.09/8,640.16
  6. Step 6: Final answer
    x = 6,781.20

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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.