Home / 8,690.12-13,037.60-3,421.88

Finding the Fourth Proportional to 8,690.12, 13,037.60 and 3,421.88

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Solution

The fourth proportional to 8,690.12, 13,037.60 and 3,421.88 is: 5,133.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.12 : 13,037.60 = 3,421.88 : x
  2. Step 2: Convert to fraction form
    8,690.12/13,037.60 = 3,421.88/x
  3. Step 3: Cross multiply
    8,690.12x = 13,037.60 × 3,421.88
  4. Step 4: Simplify right side
    8,690.12x = 44,613,094.95
  5. Step 5: Solve for x
    x = 44,613,094.95/8,690.12
  6. Step 6: Final answer
    x = 5,133.77

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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.