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Finding the Fourth Proportional to 13,812.59, 20,719.60 and 3,953.32

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Solution

The fourth proportional to 13,812.59, 20,719.60 and 3,953.32 is: 5,930.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.59 : 20,719.60 = 3,953.32 : x
  2. Step 2: Convert to fraction form
    13,812.59/20,719.60 = 3,953.32/x
  3. Step 3: Cross multiply
    13,812.59x = 20,719.60 × 3,953.32
  4. Step 4: Simplify right side
    13,812.59x = 81,911,263.94
  5. Step 5: Solve for x
    x = 81,911,263.94/13,812.59
  6. Step 6: Final answer
    x = 5,930.19

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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.