Home / 20,755.85-28,642.95-11,803.35

Finding the Fourth Proportional to 20,755.85, 28,642.95 and 11,803.35

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Solution

The fourth proportional to 20,755.85, 28,642.95 and 11,803.35 is: 16,288.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.85 : 28,642.95 = 11,803.35 : x
  2. Step 2: Convert to fraction form
    20,755.85/28,642.95 = 11,803.35/x
  3. Step 3: Cross multiply
    20,755.85x = 28,642.95 × 11,803.35
  4. Step 4: Simplify right side
    20,755.85x = 338,082,871.29
  5. Step 5: Solve for x
    x = 338,082,871.29/20,755.85
  6. Step 6: Final answer
    x = 16,288.56

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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.