Home / 21,105.93-29,126.49-12,155.04

Finding the Fourth Proportional to 21,105.93, 29,126.49 and 12,155.04

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Solution

The fourth proportional to 21,105.93, 29,126.49 and 12,155.04 is: 16,774.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.93 : 29,126.49 = 12,155.04 : x
  2. Step 2: Convert to fraction form
    21,105.93/29,126.49 = 12,155.04/x
  3. Step 3: Cross multiply
    21,105.93x = 29,126.49 × 12,155.04
  4. Step 4: Simplify right side
    21,105.93x = 354,033,651.01
  5. Step 5: Solve for x
    x = 354,033,651.01/21,105.93
  6. Step 6: Final answer
    x = 16,774.13

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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.