Home / 25,421.91-38,138.93-7,891.68

Finding the Fourth Proportional to 25,421.91, 38,138.93 and 7,891.68

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Solution

The fourth proportional to 25,421.91, 38,138.93 and 7,891.68 is: 11,839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,421.91 : 38,138.93 = 7,891.68 : x
  2. Step 2: Convert to fraction form
    25,421.91/38,138.93 = 7,891.68/x
  3. Step 3: Cross multiply
    25,421.91x = 38,138.93 × 7,891.68
  4. Step 4: Simplify right side
    25,421.91x = 300,980,231.10
  5. Step 5: Solve for x
    x = 300,980,231.10/25,421.91
  6. Step 6: Final answer
    x = 11,839.40

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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.