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Finding the Fourth Proportional to 21,991.69, 32,995.84 and 13,232.76

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Solution

The fourth proportional to 21,991.69, 32,995.84 and 13,232.76 is: 19,854.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.69 : 32,995.84 = 13,232.76 : x
  2. Step 2: Convert to fraction form
    21,991.69/32,995.84 = 13,232.76/x
  3. Step 3: Cross multiply
    21,991.69x = 32,995.84 × 13,232.76
  4. Step 4: Simplify right side
    21,991.69x = 436,626,031.72
  5. Step 5: Solve for x
    x = 436,626,031.72/21,991.69
  6. Step 6: Final answer
    x = 19,854.14

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.