Home / 13,909.99-19,189.69-8,317.75

Finding the Fourth Proportional to 13,909.99, 19,189.69 and 8,317.75

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Solution

The fourth proportional to 13,909.99, 19,189.69 and 8,317.75 is: 11,474.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.99 : 19,189.69 = 8,317.75 : x
  2. Step 2: Convert to fraction form
    13,909.99/19,189.69 = 8,317.75/x
  3. Step 3: Cross multiply
    13,909.99x = 19,189.69 × 8,317.75
  4. Step 4: Simplify right side
    13,909.99x = 159,615,044.00
  5. Step 5: Solve for x
    x = 159,615,044.00/13,909.99
  6. Step 6: Final answer
    x = 11,474.85

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.