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Finding the Fourth Proportional to 20,894.76, 28,835.46 and 11,463.84

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Solution

The fourth proportional to 20,894.76, 28,835.46 and 11,463.84 is: 15,820.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.76 : 28,835.46 = 11,463.84 : x
  2. Step 2: Convert to fraction form
    20,894.76/28,835.46 = 11,463.84/x
  3. Step 3: Cross multiply
    20,894.76x = 28,835.46 × 11,463.84
  4. Step 4: Simplify right side
    20,894.76x = 330,565,099.77
  5. Step 5: Solve for x
    x = 330,565,099.77/20,894.76
  6. Step 6: Final answer
    x = 15,820.48

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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.