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Finding the Fourth Proportional to 8,788.80, 12,128.16 and 4,809.99

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Solution

The fourth proportional to 8,788.80, 12,128.16 and 4,809.99 is: 6,637.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.80 : 12,128.16 = 4,809.99 : x
  2. Step 2: Convert to fraction form
    8,788.80/12,128.16 = 4,809.99/x
  3. Step 3: Cross multiply
    8,788.80x = 12,128.16 × 4,809.99
  4. Step 4: Simplify right side
    8,788.80x = 58,336,328.32
  5. Step 5: Solve for x
    x = 58,336,328.32/8,788.80
  6. Step 6: Final answer
    x = 6,637.58

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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.