Home / 21,151.80-29,130.30-20,692.62

Finding the Fourth Proportional to 21,151.80, 29,130.30 and 20,692.62

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Solution

The fourth proportional to 21,151.80, 29,130.30 and 20,692.62 is: 28,497.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.80 : 29,130.30 = 20,692.62 : x
  2. Step 2: Convert to fraction form
    21,151.80/29,130.30 = 20,692.62/x
  3. Step 3: Cross multiply
    21,151.80x = 29,130.30 × 20,692.62
  4. Step 4: Simplify right side
    21,151.80x = 602,782,228.39
  5. Step 5: Solve for x
    x = 602,782,228.39/21,151.80
  6. Step 6: Final answer
    x = 28,497.92

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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.