Home / 21,167.52-31,749.06-8,688.86

Finding the Fourth Proportional to 21,167.52, 31,749.06 and 8,688.86

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Solution

The fourth proportional to 21,167.52, 31,749.06 and 8,688.86 is: 13,032.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,167.52 : 31,749.06 = 8,688.86 : x
  2. Step 2: Convert to fraction form
    21,167.52/31,749.06 = 8,688.86/x
  3. Step 3: Cross multiply
    21,167.52x = 31,749.06 × 8,688.86
  4. Step 4: Simplify right side
    21,167.52x = 275,863,137.47
  5. Step 5: Solve for x
    x = 275,863,137.47/21,167.52
  6. Step 6: Final answer
    x = 13,032.38

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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.