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Finding the Fourth Proportional to 8,637.52, 11,919.64 and 4,809.12

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Solution

The fourth proportional to 8,637.52, 11,919.64 and 4,809.12 is: 6,636.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,637.52 : 11,919.64 = 4,809.12 : x
  2. Step 2: Convert to fraction form
    8,637.52/11,919.64 = 4,809.12/x
  3. Step 3: Cross multiply
    8,637.52x = 11,919.64 × 4,809.12
  4. Step 4: Simplify right side
    8,637.52x = 57,322,979.12
  5. Step 5: Solve for x
    x = 57,322,979.12/8,637.52
  6. Step 6: Final answer
    x = 6,636.51

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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.