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Finding the Fourth Proportional to 8,987.69, 13,475.90 and 2,745.63

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Solution

The fourth proportional to 8,987.69, 13,475.90 and 2,745.63 is: 4,116.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.69 : 13,475.90 = 2,745.63 : x
  2. Step 2: Convert to fraction form
    8,987.69/13,475.90 = 2,745.63/x
  3. Step 3: Cross multiply
    8,987.69x = 13,475.90 × 2,745.63
  4. Step 4: Simplify right side
    8,987.69x = 36,999,842.18
  5. Step 5: Solve for x
    x = 36,999,842.18/8,987.69
  6. Step 6: Final answer
    x = 4,116.72

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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.