Home / 20,120.40-27,747.90-12,567.36

Finding the Fourth Proportional to 20,120.40, 27,747.90 and 12,567.36

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Solution

The fourth proportional to 20,120.40, 27,747.90 and 12,567.36 is: 17,331.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.40 : 27,747.90 = 12,567.36 : x
  2. Step 2: Convert to fraction form
    20,120.40/27,747.90 = 12,567.36/x
  3. Step 3: Cross multiply
    20,120.40x = 27,747.90 × 12,567.36
  4. Step 4: Simplify right side
    20,120.40x = 348,717,848.54
  5. Step 5: Solve for x
    x = 348,717,848.54/20,120.40
  6. Step 6: Final answer
    x = 17,331.56

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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.