Home / 12,779.88-19,145.67-7,237.20

Finding the Fourth Proportional to 12,779.88, 19,145.67 and 7,237.20

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Solution

The fourth proportional to 12,779.88, 19,145.67 and 7,237.20 is: 10,842.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.88 : 19,145.67 = 7,237.20 : x
  2. Step 2: Convert to fraction form
    12,779.88/19,145.67 = 7,237.20/x
  3. Step 3: Cross multiply
    12,779.88x = 19,145.67 × 7,237.20
  4. Step 4: Simplify right side
    12,779.88x = 138,560,979.89
  5. Step 5: Solve for x
    x = 138,560,979.89/12,779.88
  6. Step 6: Final answer
    x = 10,842.12

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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.