Home / 15,521.02-21,419.49-8,447.92

Finding the Fourth Proportional to 15,521.02, 21,419.49 and 8,447.92

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Solution

The fourth proportional to 15,521.02, 21,419.49 and 8,447.92 is: 11,658.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.02 : 21,419.49 = 8,447.92 : x
  2. Step 2: Convert to fraction form
    15,521.02/21,419.49 = 8,447.92/x
  3. Step 3: Cross multiply
    15,521.02x = 21,419.49 × 8,447.92
  4. Step 4: Simplify right side
    15,521.02x = 180,950,137.96
  5. Step 5: Solve for x
    x = 180,950,137.96/15,521.02
  6. Step 6: Final answer
    x = 11,658.39

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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.