Home / 5,187.40-7,779.90-1,723.72

Finding the Fourth Proportional to 5,187.40, 7,779.90 and 1,723.72

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Solution

The fourth proportional to 5,187.40, 7,779.90 and 1,723.72 is: 2,585.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.40 : 7,779.90 = 1,723.72 : x
  2. Step 2: Convert to fraction form
    5,187.40/7,779.90 = 1,723.72/x
  3. Step 3: Cross multiply
    5,187.40x = 7,779.90 × 1,723.72
  4. Step 4: Simplify right side
    5,187.40x = 13,410,369.23
  5. Step 5: Solve for x
    x = 13,410,369.23/5,187.40
  6. Step 6: Final answer
    x = 2,585.18

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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.