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Finding the Fourth Proportional to 8,788.74, 12,128.47 and 4,809.88

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Solution

The fourth proportional to 8,788.74, 12,128.47 and 4,809.88 is: 6,637.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.74 : 12,128.47 = 4,809.88 : x
  2. Step 2: Convert to fraction form
    8,788.74/12,128.47 = 4,809.88/x
  3. Step 3: Cross multiply
    8,788.74x = 12,128.47 × 4,809.88
  4. Step 4: Simplify right side
    8,788.74x = 58,336,485.28
  5. Step 5: Solve for x
    x = 58,336,485.28/8,788.74
  6. Step 6: Final answer
    x = 6,637.64

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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.