Home / 21,721.08-29,976.90-12,291.44

Finding the Fourth Proportional to 21,721.08, 29,976.90 and 12,291.44

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Solution

The fourth proportional to 21,721.08, 29,976.90 and 12,291.44 is: 16,963.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.08 : 29,976.90 = 12,291.44 : x
  2. Step 2: Convert to fraction form
    21,721.08/29,976.90 = 12,291.44/x
  3. Step 3: Cross multiply
    21,721.08x = 29,976.90 × 12,291.44
  4. Step 4: Simplify right side
    21,721.08x = 368,459,267.74
  5. Step 5: Solve for x
    x = 368,459,267.74/21,721.08
  6. Step 6: Final answer
    x = 16,963.21

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1.5x scale

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.