Home / 21,137.99-29,171.34-11,706.55

Finding the Fourth Proportional to 21,137.99, 29,171.34 and 11,706.55

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Solution

The fourth proportional to 21,137.99, 29,171.34 and 11,706.55 is: 16,155.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.99 : 29,171.34 = 11,706.55 : x
  2. Step 2: Convert to fraction form
    21,137.99/29,171.34 = 11,706.55/x
  3. Step 3: Cross multiply
    21,137.99x = 29,171.34 × 11,706.55
  4. Step 4: Simplify right side
    21,137.99x = 341,495,677.35
  5. Step 5: Solve for x
    x = 341,495,677.35/21,137.99
  6. Step 6: Final answer
    x = 16,155.55

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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.