Home / 20,345.99-28,076.11-11,270.74

Finding the Fourth Proportional to 20,345.99, 28,076.11 and 11,270.74

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Solution

The fourth proportional to 20,345.99, 28,076.11 and 11,270.74 is: 15,552.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.99 : 28,076.11 = 11,270.74 : x
  2. Step 2: Convert to fraction form
    20,345.99/28,076.11 = 11,270.74/x
  3. Step 3: Cross multiply
    20,345.99x = 28,076.11 × 11,270.74
  4. Step 4: Simplify right side
    20,345.99x = 316,438,500.86
  5. Step 5: Solve for x
    x = 316,438,500.86/20,345.99
  6. Step 6: Final answer
    x = 15,552.87

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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.