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Finding the Fourth Proportional to 10,636.79, 15,953.20 and 3,138.76

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Solution

The fourth proportional to 10,636.79, 15,953.20 and 3,138.76 is: 4,707.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,636.79 : 15,953.20 = 3,138.76 : x
  2. Step 2: Convert to fraction form
    10,636.79/15,953.20 = 3,138.76/x
  3. Step 3: Cross multiply
    10,636.79x = 15,953.20 × 3,138.76
  4. Step 4: Simplify right side
    10,636.79x = 50,073,218.30
  5. Step 5: Solve for x
    x = 50,073,218.30/10,636.79
  6. Step 6: Final answer
    x = 4,707.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.