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Finding the Fourth Proportional to 8,780.40, 13,170.40 and 2,455.11

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Solution

The fourth proportional to 8,780.40, 13,170.40 and 2,455.11 is: 3,682.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,780.40 : 13,170.40 = 2,455.11 : x
  2. Step 2: Convert to fraction form
    8,780.40/13,170.40 = 2,455.11/x
  3. Step 3: Cross multiply
    8,780.40x = 13,170.40 × 2,455.11
  4. Step 4: Simplify right side
    8,780.40x = 32,334,714.89
  5. Step 5: Solve for x
    x = 32,334,714.89/8,780.40
  6. Step 6: Final answer
    x = 3,682.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.