Home / 21,073.78-29,085.72-12,121.36

Finding the Fourth Proportional to 21,073.78, 29,085.72 and 12,121.36

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Solution

The fourth proportional to 21,073.78, 29,085.72 and 12,121.36 is: 16,729.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,073.78 : 29,085.72 = 12,121.36 : x
  2. Step 2: Convert to fraction form
    21,073.78/29,085.72 = 12,121.36/x
  3. Step 3: Cross multiply
    21,073.78x = 29,085.72 × 12,121.36
  4. Step 4: Simplify right side
    21,073.78x = 352,558,482.98
  5. Step 5: Solve for x
    x = 352,558,482.98/21,073.78
  6. Step 6: Final answer
    x = 16,729.72

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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.