Home / 20,472.87-30,709.31-5,681.79

Finding the Fourth Proportional to 20,472.87, 30,709.31 and 5,681.79

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Solution

The fourth proportional to 20,472.87, 30,709.31 and 5,681.79 is: 8,522.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.87 : 30,709.31 = 5,681.79 : x
  2. Step 2: Convert to fraction form
    20,472.87/30,709.31 = 5,681.79/x
  3. Step 3: Cross multiply
    20,472.87x = 30,709.31 × 5,681.79
  4. Step 4: Simplify right side
    20,472.87x = 174,483,822.06
  5. Step 5: Solve for x
    x = 174,483,822.06/20,472.87
  6. Step 6: Final answer
    x = 8,522.69

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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.