Home / 21,151.82-29,130.29-20,692.62

Finding the Fourth Proportional to 21,151.82, 29,130.29 and 20,692.62

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Solution

The fourth proportional to 21,151.82, 29,130.29 and 20,692.62 is: 28,497.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.82 : 29,130.29 = 20,692.62 : x
  2. Step 2: Convert to fraction form
    21,151.82/29,130.29 = 20,692.62/x
  3. Step 3: Cross multiply
    21,151.82x = 29,130.29 × 20,692.62
  4. Step 4: Simplify right side
    21,151.82x = 602,782,021.46
  5. Step 5: Solve for x
    x = 602,782,021.46/21,151.82
  6. Step 6: Final answer
    x = 28,497.88

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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.