Home / 20,088.78-27,723.18-12,129.42

Finding the Fourth Proportional to 20,088.78, 27,723.18 and 12,129.42

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Solution

The fourth proportional to 20,088.78, 27,723.18 and 12,129.42 is: 16,739.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.78 : 27,723.18 = 12,129.42 : x
  2. Step 2: Convert to fraction form
    20,088.78/27,723.18 = 12,129.42/x
  3. Step 3: Cross multiply
    20,088.78x = 27,723.18 × 12,129.42
  4. Step 4: Simplify right side
    20,088.78x = 336,266,093.96
  5. Step 5: Solve for x
    x = 336,266,093.96/20,088.78
  6. Step 6: Final answer
    x = 16,739.00

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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.