Home / 21,182.88-31,749.28-8,695.20

Finding the Fourth Proportional to 21,182.88, 31,749.28 and 8,695.20

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Solution

The fourth proportional to 21,182.88, 31,749.28 and 8,695.20 is: 13,032.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,182.88 : 31,749.28 = 8,695.20 : x
  2. Step 2: Convert to fraction form
    21,182.88/31,749.28 = 8,695.20/x
  3. Step 3: Cross multiply
    21,182.88x = 31,749.28 × 8,695.20
  4. Step 4: Simplify right side
    21,182.88x = 276,066,339.46
  5. Step 5: Solve for x
    x = 276,066,339.46/21,182.88
  6. Step 6: Final answer
    x = 13,032.52

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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.