Home / 21,338.99-29,438.43-20,350.79

Finding the Fourth Proportional to 21,338.99, 29,438.43 and 20,350.79

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Solution

The fourth proportional to 21,338.99, 29,438.43 and 20,350.79 is: 28,075.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.99 : 29,438.43 = 20,350.79 : x
  2. Step 2: Convert to fraction form
    21,338.99/29,438.43 = 20,350.79/x
  3. Step 3: Cross multiply
    21,338.99x = 29,438.43 × 20,350.79
  4. Step 4: Simplify right side
    21,338.99x = 599,095,306.86
  5. Step 5: Solve for x
    x = 599,095,306.86/21,338.99
  6. Step 6: Final answer
    x = 28,075.15

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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.