Home / 21,271.18-29,360.66-12,320.88

Finding the Fourth Proportional to 21,271.18, 29,360.66 and 12,320.88

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Solution

The fourth proportional to 21,271.18, 29,360.66 and 12,320.88 is: 17,006.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.18 : 29,360.66 = 12,320.88 : x
  2. Step 2: Convert to fraction form
    21,271.18/29,360.66 = 12,320.88/x
  3. Step 3: Cross multiply
    21,271.18x = 29,360.66 × 12,320.88
  4. Step 4: Simplify right side
    21,271.18x = 361,749,168.58
  5. Step 5: Solve for x
    x = 361,749,168.58/21,271.18
  6. Step 6: Final answer
    x = 17,006.54

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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.