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Finding the Fourth Proportional to 8,781.65, 12,118.06 and 4,802.68

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Solution

The fourth proportional to 8,781.65, 12,118.06 and 4,802.68 is: 6,627.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.65 : 12,118.06 = 4,802.68 : x
  2. Step 2: Convert to fraction form
    8,781.65/12,118.06 = 4,802.68/x
  3. Step 3: Cross multiply
    8,781.65x = 12,118.06 × 4,802.68
  4. Step 4: Simplify right side
    8,781.65x = 58,199,164.40
  5. Step 5: Solve for x
    x = 58,199,164.40/8,781.65
  6. Step 6: Final answer
    x = 6,627.36

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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.