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Finding the Fourth Proportional to 8,979.84, 12,395.52 and 5,258.88

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Solution

The fourth proportional to 8,979.84, 12,395.52 and 5,258.88 is: 7,259.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.84 : 12,395.52 = 5,258.88 : x
  2. Step 2: Convert to fraction form
    8,979.84/12,395.52 = 5,258.88/x
  3. Step 3: Cross multiply
    8,979.84x = 12,395.52 × 5,258.88
  4. Step 4: Simplify right side
    8,979.84x = 65,186,552.22
  5. Step 5: Solve for x
    x = 65,186,552.22/8,979.84
  6. Step 6: Final answer
    x = 7,259.21

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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.