Home / 21,031.24-31,538.22-7,876.84

Finding the Fourth Proportional to 21,031.24, 31,538.22 and 7,876.84

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Solution

The fourth proportional to 21,031.24, 31,538.22 and 7,876.84 is: 11,812.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.24 : 31,538.22 = 7,876.84 : x
  2. Step 2: Convert to fraction form
    21,031.24/31,538.22 = 7,876.84/x
  3. Step 3: Cross multiply
    21,031.24x = 31,538.22 × 7,876.84
  4. Step 4: Simplify right side
    21,031.24x = 248,421,512.82
  5. Step 5: Solve for x
    x = 248,421,512.82/21,031.24
  6. Step 6: Final answer
    x = 11,812.02

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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.