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Finding the Fourth Proportional to 21,159.99, 29,186.90 and 13,594.39

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Solution

The fourth proportional to 21,159.99, 29,186.90 and 13,594.39 is: 18,751.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.99 : 29,186.90 = 13,594.39 : x
  2. Step 2: Convert to fraction form
    21,159.99/29,186.90 = 13,594.39/x
  3. Step 3: Cross multiply
    21,159.99x = 29,186.90 × 13,594.39
  4. Step 4: Simplify right side
    21,159.99x = 396,778,011.53
  5. Step 5: Solve for x
    x = 396,778,011.53/21,159.99
  6. Step 6: Final answer
    x = 18,751.33

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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.