Home / 21,109.52-31,655.36-6,320.54

Finding the Fourth Proportional to 21,109.52, 31,655.36 and 6,320.54

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Solution

The fourth proportional to 21,109.52, 31,655.36 and 6,320.54 is: 9,478.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.52 : 31,655.36 = 6,320.54 : x
  2. Step 2: Convert to fraction form
    21,109.52/31,655.36 = 6,320.54/x
  3. Step 3: Cross multiply
    21,109.52x = 31,655.36 × 6,320.54
  4. Step 4: Simplify right side
    21,109.52x = 200,078,969.09
  5. Step 5: Solve for x
    x = 200,078,969.09/21,109.52
  6. Step 6: Final answer
    x = 9,478.14

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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.