Home / 13,985.87-20,961.48-6,484.91

Finding the Fourth Proportional to 13,985.87, 20,961.48 and 6,484.91

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Solution

The fourth proportional to 13,985.87, 20,961.48 and 6,484.91 is: 9,719.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.87 : 20,961.48 = 6,484.91 : x
  2. Step 2: Convert to fraction form
    13,985.87/20,961.48 = 6,484.91/x
  3. Step 3: Cross multiply
    13,985.87x = 20,961.48 × 6,484.91
  4. Step 4: Simplify right side
    13,985.87x = 135,933,348.69
  5. Step 5: Solve for x
    x = 135,933,348.69/13,985.87
  6. Step 6: Final answer
    x = 9,719.34

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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.