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Finding the Fourth Proportional to 8,788.86, 12,128.04 and 4,809.87

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Solution

The fourth proportional to 8,788.86, 12,128.04 and 4,809.87 is: 6,637.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.86 : 12,128.04 = 4,809.87 : x
  2. Step 2: Convert to fraction form
    8,788.86/12,128.04 = 4,809.87/x
  3. Step 3: Cross multiply
    8,788.86x = 12,128.04 × 4,809.87
  4. Step 4: Simplify right side
    8,788.86x = 58,334,295.75
  5. Step 5: Solve for x
    x = 58,334,295.75/8,788.86
  6. Step 6: Final answer
    x = 6,637.30

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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.