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Finding the Fourth Proportional to 8,781.60, 12,118.50 and 4,802.64

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Solution

The fourth proportional to 8,781.60, 12,118.50 and 4,802.64 is: 6,627.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.60 : 12,118.50 = 4,802.64 : x
  2. Step 2: Convert to fraction form
    8,781.60/12,118.50 = 4,802.64/x
  3. Step 3: Cross multiply
    8,781.60x = 12,118.50 × 4,802.64
  4. Step 4: Simplify right side
    8,781.60x = 58,200,792.84
  5. Step 5: Solve for x
    x = 58,200,792.84/8,781.60
  6. Step 6: Final answer
    x = 6,627.58

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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.