Home / 13,779.24-19,016.52-7,812

Finding the Fourth Proportional to 13,779.24, 19,016.52 and 7,812

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Solution

The fourth proportional to 13,779.24, 19,016.52 and 7,812 is: 10,781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.24 : 19,016.52 = 7,812 : x
  2. Step 2: Convert to fraction form
    13,779.24/19,016.52 = 7,812/x
  3. Step 3: Cross multiply
    13,779.24x = 19,016.52 × 7,812
  4. Step 4: Simplify right side
    13,779.24x = 148,557,054.24
  5. Step 5: Solve for x
    x = 148,557,054.24/13,779.24
  6. Step 6: Final answer
    x = 10,781.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.