Home / 18,718.68-28,063.90-11,321.56

Finding the Fourth Proportional to 18,718.68, 28,063.90 and 11,321.56

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Solution

The fourth proportional to 18,718.68, 28,063.90 and 11,321.56 is: 16,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.68 : 28,063.90 = 11,321.56 : x
  2. Step 2: Convert to fraction form
    18,718.68/28,063.90 = 11,321.56/x
  3. Step 3: Cross multiply
    18,718.68x = 28,063.90 × 11,321.56
  4. Step 4: Simplify right side
    18,718.68x = 317,727,127.68
  5. Step 5: Solve for x
    x = 317,727,127.68/18,718.68
  6. Step 6: Final answer
    x = 16,973.80

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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.