Home / 21,031.32-29,023.25-11,471.23

Finding the Fourth Proportional to 21,031.32, 29,023.25 and 11,471.23

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Solution

The fourth proportional to 21,031.32, 29,023.25 and 11,471.23 is: 15,830.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.32 : 29,023.25 = 11,471.23 : x
  2. Step 2: Convert to fraction form
    21,031.32/29,023.25 = 11,471.23/x
  3. Step 3: Cross multiply
    21,031.32x = 29,023.25 × 11,471.23
  4. Step 4: Simplify right side
    21,031.32x = 332,932,376.10
  5. Step 5: Solve for x
    x = 332,932,376.10/21,031.32
  6. Step 6: Final answer
    x = 15,830.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.