Home / 15,688.99-21,651.15-8,615.44

Finding the Fourth Proportional to 15,688.99, 21,651.15 and 8,615.44

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Solution

The fourth proportional to 15,688.99, 21,651.15 and 8,615.44 is: 11,889.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.99 : 21,651.15 = 8,615.44 : x
  2. Step 2: Convert to fraction form
    15,688.99/21,651.15 = 8,615.44/x
  3. Step 3: Cross multiply
    15,688.99x = 21,651.15 × 8,615.44
  4. Step 4: Simplify right side
    15,688.99x = 186,534,183.76
  5. Step 5: Solve for x
    x = 186,534,183.76/15,688.99
  6. Step 6: Final answer
    x = 11,889.50

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Half scale
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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.