Home / 20,530.41-28,334.50-11,577.75

Finding the Fourth Proportional to 20,530.41, 28,334.50 and 11,577.75

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Solution

The fourth proportional to 20,530.41, 28,334.50 and 11,577.75 is: 15,978.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.41 : 28,334.50 = 11,577.75 : x
  2. Step 2: Convert to fraction form
    20,530.41/28,334.50 = 11,577.75/x
  3. Step 3: Cross multiply
    20,530.41x = 28,334.50 × 11,577.75
  4. Step 4: Simplify right side
    20,530.41x = 328,049,728.43
  5. Step 5: Solve for x
    x = 328,049,728.43/20,530.41
  6. Step 6: Final answer
    x = 15,978.72

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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.