Home / 21,038.27-31,557.60-5,455.89

Finding the Fourth Proportional to 21,038.27, 31,557.60 and 5,455.89

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Solution

The fourth proportional to 21,038.27, 31,557.60 and 5,455.89 is: 8,183.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.27 : 31,557.60 = 5,455.89 : x
  2. Step 2: Convert to fraction form
    21,038.27/31,557.60 = 5,455.89/x
  3. Step 3: Cross multiply
    21,038.27x = 31,557.60 × 5,455.89
  4. Step 4: Simplify right side
    21,038.27x = 172,174,794.26
  5. Step 5: Solve for x
    x = 172,174,794.26/21,038.27
  6. Step 6: Final answer
    x = 8,183.89

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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.