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Finding the Fourth Proportional to 8,780.65, 12,116.68 and 4,801.68

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Solution

The fourth proportional to 8,780.65, 12,116.68 and 4,801.68 is: 6,625.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.65 : 12,116.68 = 4,801.68 : x
  2. Step 2: Convert to fraction form
    8,780.65/12,116.68 = 4,801.68/x
  3. Step 3: Cross multiply
    8,780.65x = 12,116.68 × 4,801.68
  4. Step 4: Simplify right side
    8,780.65x = 58,180,389.73
  5. Step 5: Solve for x
    x = 58,180,389.73/8,780.65
  6. Step 6: Final answer
    x = 6,625.98

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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.