Home / 13,779.75-19,017.66-7,731.66

Finding the Fourth Proportional to 13,779.75, 19,017.66 and 7,731.66

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Solution

The fourth proportional to 13,779.75, 19,017.66 and 7,731.66 is: 10,670.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.75 : 19,017.66 = 7,731.66 : x
  2. Step 2: Convert to fraction form
    13,779.75/19,017.66 = 7,731.66/x
  3. Step 3: Cross multiply
    13,779.75x = 19,017.66 × 7,731.66
  4. Step 4: Simplify right side
    13,779.75x = 147,038,081.12
  5. Step 5: Solve for x
    x = 147,038,081.12/13,779.75
  6. Step 6: Final answer
    x = 10,670.59

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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.