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Finding the Fourth Proportional to 8,612.76, 12,924.18 and 4,920.24

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Solution

The fourth proportional to 8,612.76, 12,924.18 and 4,920.24 is: 7,383.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.76 : 12,924.18 = 4,920.24 : x
  2. Step 2: Convert to fraction form
    8,612.76/12,924.18 = 4,920.24/x
  3. Step 3: Cross multiply
    8,612.76x = 12,924.18 × 4,920.24
  4. Step 4: Simplify right side
    8,612.76x = 63,590,067.40
  5. Step 5: Solve for x
    x = 63,590,067.40/8,612.76
  6. Step 6: Final answer
    x = 7,383.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.