Home / 21,169.80-29,155.23-20,710.56

Finding the Fourth Proportional to 21,169.80, 29,155.23 and 20,710.56

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Solution

The fourth proportional to 21,169.80, 29,155.23 and 20,710.56 is: 28,522.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.80 : 29,155.23 = 20,710.56 : x
  2. Step 2: Convert to fraction form
    21,169.80/29,155.23 = 20,710.56/x
  3. Step 3: Cross multiply
    21,169.80x = 29,155.23 × 20,710.56
  4. Step 4: Simplify right side
    21,169.80x = 603,821,140.23
  5. Step 5: Solve for x
    x = 603,821,140.23/21,169.80
  6. Step 6: Final answer
    x = 28,522.76

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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.