Home / 21,725.48-29,981.69-12,165.28

Finding the Fourth Proportional to 21,725.48, 29,981.69 and 12,165.28

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Solution

The fourth proportional to 21,725.48, 29,981.69 and 12,165.28 is: 16,788.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,725.48 : 29,981.69 = 12,165.28 : x
  2. Step 2: Convert to fraction form
    21,725.48/29,981.69 = 12,165.28/x
  3. Step 3: Cross multiply
    21,725.48x = 29,981.69 × 12,165.28
  4. Step 4: Simplify right side
    21,725.48x = 364,735,592.90
  5. Step 5: Solve for x
    x = 364,735,592.90/21,725.48
  6. Step 6: Final answer
    x = 16,788.38

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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.