Home / 21,311.43-29,410.16-11,878.98

Finding the Fourth Proportional to 21,311.43, 29,410.16 and 11,878.98

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Solution

The fourth proportional to 21,311.43, 29,410.16 and 11,878.98 is: 16,393.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.43 : 29,410.16 = 11,878.98 : x
  2. Step 2: Convert to fraction form
    21,311.43/29,410.16 = 11,878.98/x
  3. Step 3: Cross multiply
    21,311.43x = 29,410.16 × 11,878.98
  4. Step 4: Simplify right side
    21,311.43x = 349,362,702.44
  5. Step 5: Solve for x
    x = 349,362,702.44/21,311.43
  6. Step 6: Final answer
    x = 16,393.21

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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.