Home / 21,140.88-31,711.32-5,558.48

Finding the Fourth Proportional to 21,140.88, 31,711.32 and 5,558.48

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Solution

The fourth proportional to 21,140.88, 31,711.32 and 5,558.48 is: 8,337.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.88 : 31,711.32 = 5,558.48 : x
  2. Step 2: Convert to fraction form
    21,140.88/31,711.32 = 5,558.48/x
  3. Step 3: Cross multiply
    21,140.88x = 31,711.32 × 5,558.48
  4. Step 4: Simplify right side
    21,140.88x = 176,266,737.99
  5. Step 5: Solve for x
    x = 176,266,737.99/21,140.88
  6. Step 6: Final answer
    x = 8,337.72

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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.