Home / 18,864.72-28,286.24-7,779.06

Finding the Fourth Proportional to 18,864.72, 28,286.24 and 7,779.06

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Solution

The fourth proportional to 18,864.72, 28,286.24 and 7,779.06 is: 11,664.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,864.72 : 28,286.24 = 7,779.06 : x
  2. Step 2: Convert to fraction form
    18,864.72/28,286.24 = 7,779.06/x
  3. Step 3: Cross multiply
    18,864.72x = 28,286.24 × 7,779.06
  4. Step 4: Simplify right side
    18,864.72x = 220,040,358.13
  5. Step 5: Solve for x
    x = 220,040,358.13/18,864.72
  6. Step 6: Final answer
    x = 11,664.12

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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.