Home / 21,153.52-31,730.35-5,358.54

Finding the Fourth Proportional to 21,153.52, 31,730.35 and 5,358.54

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Solution

The fourth proportional to 21,153.52, 31,730.35 and 5,358.54 is: 8,037.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.52 : 31,730.35 = 5,358.54 : x
  2. Step 2: Convert to fraction form
    21,153.52/31,730.35 = 5,358.54/x
  3. Step 3: Cross multiply
    21,153.52x = 31,730.35 × 5,358.54
  4. Step 4: Simplify right side
    21,153.52x = 170,028,349.69
  5. Step 5: Solve for x
    x = 170,028,349.69/21,153.52
  6. Step 6: Final answer
    x = 8,037.83

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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.