Home / 21,328.58-31,989.23-5,742.56

Finding the Fourth Proportional to 21,328.58, 31,989.23 and 5,742.56

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Solution

The fourth proportional to 21,328.58, 31,989.23 and 5,742.56 is: 8,612.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.58 : 31,989.23 = 5,742.56 : x
  2. Step 2: Convert to fraction form
    21,328.58/31,989.23 = 5,742.56/x
  3. Step 3: Cross multiply
    21,328.58x = 31,989.23 × 5,742.56
  4. Step 4: Simplify right side
    21,328.58x = 183,700,145.42
  5. Step 5: Solve for x
    x = 183,700,145.42/21,328.58
  6. Step 6: Final answer
    x = 8,612.86

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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.