Home / 28,519.47-42,779.21-7,742.97

Finding the Fourth Proportional to 28,519.47, 42,779.21 and 7,742.97

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Solution

The fourth proportional to 28,519.47, 42,779.21 and 7,742.97 is: 11,614.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,519.47 : 42,779.21 = 7,742.97 : x
  2. Step 2: Convert to fraction form
    28,519.47/42,779.21 = 7,742.97/x
  3. Step 3: Cross multiply
    28,519.47x = 42,779.21 × 7,742.97
  4. Step 4: Simplify right side
    28,519.47x = 331,238,139.65
  5. Step 5: Solve for x
    x = 331,238,139.65/28,519.47
  6. Step 6: Final answer
    x = 11,614.46

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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.