Home / 20,520.86-28,317.08-11,570.56

Finding the Fourth Proportional to 20,520.86, 28,317.08 and 11,570.56

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Solution

The fourth proportional to 20,520.86, 28,317.08 and 11,570.56 is: 15,966.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.86 : 28,317.08 = 11,570.56 : x
  2. Step 2: Convert to fraction form
    20,520.86/28,317.08 = 11,570.56/x
  3. Step 3: Cross multiply
    20,520.86x = 28,317.08 × 11,570.56
  4. Step 4: Simplify right side
    20,520.86x = 327,644,431.30
  5. Step 5: Solve for x
    x = 327,644,431.30/20,520.86
  6. Step 6: Final answer
    x = 15,966.41

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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.