Home / 21,138.22-29,164.10-12,184.48

Finding the Fourth Proportional to 21,138.22, 29,164.10 and 12,184.48

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Solution

The fourth proportional to 21,138.22, 29,164.10 and 12,184.48 is: 16,810.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.22 : 29,164.10 = 12,184.48 : x
  2. Step 2: Convert to fraction form
    21,138.22/29,164.10 = 12,184.48/x
  3. Step 3: Cross multiply
    21,138.22x = 29,164.10 × 12,184.48
  4. Step 4: Simplify right side
    21,138.22x = 355,349,273.19
  5. Step 5: Solve for x
    x = 355,349,273.19/21,138.22
  6. Step 6: Final answer
    x = 16,810.75

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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.