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Finding the Fourth Proportional to 8,987.78, 13,475.86 and 4,307.68

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Solution

The fourth proportional to 8,987.78, 13,475.86 and 4,307.68 is: 6,458.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.78 : 13,475.86 = 4,307.68 : x
  2. Step 2: Convert to fraction form
    8,987.78/13,475.86 = 4,307.68/x
  3. Step 3: Cross multiply
    8,987.78x = 13,475.86 × 4,307.68
  4. Step 4: Simplify right side
    8,987.78x = 58,049,692.60
  5. Step 5: Solve for x
    x = 58,049,692.60/8,987.78
  6. Step 6: Final answer
    x = 6,458.74

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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.