Home / 18,719.68-28,065.40-11,322.56

Finding the Fourth Proportional to 18,719.68, 28,065.40 and 11,322.56

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Solution

The fourth proportional to 18,719.68, 28,065.40 and 11,322.56 is: 16,975.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.68 : 28,065.40 = 11,322.56 : x
  2. Step 2: Convert to fraction form
    18,719.68/28,065.40 = 11,322.56/x
  3. Step 3: Cross multiply
    18,719.68x = 28,065.40 × 11,322.56
  4. Step 4: Simplify right side
    18,719.68x = 317,772,175.42
  5. Step 5: Solve for x
    x = 317,772,175.42/18,719.68
  6. Step 6: Final answer
    x = 16,975.30

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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.