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Finding the Fourth Proportional to 18,716.55, 25,807.86 and 12,751.71

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Solution

The fourth proportional to 18,716.55, 25,807.86 and 12,751.71 is: 17,583.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.55 : 25,807.86 = 12,751.71 : x
  2. Step 2: Convert to fraction form
    18,716.55/25,807.86 = 12,751.71/x
  3. Step 3: Cross multiply
    18,716.55x = 25,807.86 × 12,751.71
  4. Step 4: Simplify right side
    18,716.55x = 329,094,346.44
  5. Step 5: Solve for x
    x = 329,094,346.44/18,716.55
  6. Step 6: Final answer
    x = 17,583.07

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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.