Home / 13,871.59-20,812.62-8,328.79

Finding the Fourth Proportional to 13,871.59, 20,812.62 and 8,328.79

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Solution

The fourth proportional to 13,871.59, 20,812.62 and 8,328.79 is: 12,496.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.59 : 20,812.62 = 8,328.79 : x
  2. Step 2: Convert to fraction form
    13,871.59/20,812.62 = 8,328.79/x
  3. Step 3: Cross multiply
    13,871.59x = 20,812.62 × 8,328.79
  4. Step 4: Simplify right side
    13,871.59x = 173,343,899.69
  5. Step 5: Solve for x
    x = 173,343,899.69/13,871.59
  6. Step 6: Final answer
    x = 12,496.33

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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.