Home / 18,718.53-28,063.75-11,321.47

Finding the Fourth Proportional to 18,718.53, 28,063.75 and 11,321.47

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Solution

The fourth proportional to 18,718.53, 28,063.75 and 11,321.47 is: 16,973.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.53 : 28,063.75 = 11,321.47 : x
  2. Step 2: Convert to fraction form
    18,718.53/28,063.75 = 11,321.47/x
  3. Step 3: Cross multiply
    18,718.53x = 28,063.75 × 11,321.47
  4. Step 4: Simplify right side
    18,718.53x = 317,722,903.71
  5. Step 5: Solve for x
    x = 317,722,903.71/18,718.53
  6. Step 6: Final answer
    x = 16,973.71

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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.