Home / 18,719.78-28,065.62-11,322.72

Finding the Fourth Proportional to 18,719.78, 28,065.62 and 11,322.72

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Solution

The fourth proportional to 18,719.78, 28,065.62 and 11,322.72 is: 16,975.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.78 : 28,065.62 = 11,322.72 : x
  2. Step 2: Convert to fraction form
    18,719.78/28,065.62 = 11,322.72/x
  3. Step 3: Cross multiply
    18,719.78x = 28,065.62 × 11,322.72
  4. Step 4: Simplify right side
    18,719.78x = 317,779,185.19
  5. Step 5: Solve for x
    x = 317,779,185.19/18,719.78
  6. Step 6: Final answer
    x = 16,975.59

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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.