Home / 20,142.51-27,799.21-12,184.72

Finding the Fourth Proportional to 20,142.51, 27,799.21 and 12,184.72

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Solution

The fourth proportional to 20,142.51, 27,799.21 and 12,184.72 is: 16,816.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.51 : 27,799.21 = 12,184.72 : x
  2. Step 2: Convert to fraction form
    20,142.51/27,799.21 = 12,184.72/x
  3. Step 3: Cross multiply
    20,142.51x = 27,799.21 × 12,184.72
  4. Step 4: Simplify right side
    20,142.51x = 338,725,590.07
  5. Step 5: Solve for x
    x = 338,725,590.07/20,142.51
  6. Step 6: Final answer
    x = 16,816.45

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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.