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Finding the Fourth Proportional to 20,894.96, 28,835.16 and 11,334.92

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Solution

The fourth proportional to 20,894.96, 28,835.16 and 11,334.92 is: 15,642.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.96 : 28,835.16 = 11,334.92 : x
  2. Step 2: Convert to fraction form
    20,894.96/28,835.16 = 11,334.92/x
  3. Step 3: Cross multiply
    20,894.96x = 28,835.16 × 11,334.92
  4. Step 4: Simplify right side
    20,894.96x = 326,844,231.79
  5. Step 5: Solve for x
    x = 326,844,231.79/20,894.96
  6. Step 6: Final answer
    x = 15,642.25

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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.