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Finding the Fourth Proportional to 13,751.81, 20,505.10 and 12,674.71

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Solution

The fourth proportional to 13,751.81, 20,505.10 and 12,674.71 is: 18,899.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.81 : 20,505.10 = 12,674.71 : x
  2. Step 2: Convert to fraction form
    13,751.81/20,505.10 = 12,674.71/x
  3. Step 3: Cross multiply
    13,751.81x = 20,505.10 × 12,674.71
  4. Step 4: Simplify right side
    13,751.81x = 259,896,196.02
  5. Step 5: Solve for x
    x = 259,896,196.02/13,751.81
  6. Step 6: Final answer
    x = 18,899.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.