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Finding the Fourth Proportional to 18,730.68, 25,858.71 and 12,771.11

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Solution

The fourth proportional to 18,730.68, 25,858.71 and 12,771.11 is: 17,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,730.68 : 25,858.71 = 12,771.11 : x
  2. Step 2: Convert to fraction form
    18,730.68/25,858.71 = 12,771.11/x
  3. Step 3: Cross multiply
    18,730.68x = 25,858.71 × 12,771.11
  4. Step 4: Simplify right side
    18,730.68x = 330,244,300.57
  5. Step 5: Solve for x
    x = 330,244,300.57/18,730.68
  6. Step 6: Final answer
    x = 17,631.20

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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.