Home / 21,069.78-29,079.24-12,117.09

Finding the Fourth Proportional to 21,069.78, 29,079.24 and 12,117.09

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Solution

The fourth proportional to 21,069.78, 29,079.24 and 12,117.09 is: 16,723.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.78 : 29,079.24 = 12,117.09 : x
  2. Step 2: Convert to fraction form
    21,069.78/29,079.24 = 12,117.09/x
  3. Step 3: Cross multiply
    21,069.78x = 29,079.24 × 12,117.09
  4. Step 4: Simplify right side
    21,069.78x = 352,355,768.21
  5. Step 5: Solve for x
    x = 352,355,768.21/21,069.78
  6. Step 6: Final answer
    x = 16,723.28

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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.