Home / 20,779.65-31,163.40-7,451.10

Finding the Fourth Proportional to 20,779.65, 31,163.40 and 7,451.10

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Solution

The fourth proportional to 20,779.65, 31,163.40 and 7,451.10 is: 11,174.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.65 : 31,163.40 = 7,451.10 : x
  2. Step 2: Convert to fraction form
    20,779.65/31,163.40 = 7,451.10/x
  3. Step 3: Cross multiply
    20,779.65x = 31,163.40 × 7,451.10
  4. Step 4: Simplify right side
    20,779.65x = 232,201,609.74
  5. Step 5: Solve for x
    x = 232,201,609.74/20,779.65
  6. Step 6: Final answer
    x = 11,174.47

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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.