Home / 12,877.90-19,319.03-3,991.20

Finding the Fourth Proportional to 12,877.90, 19,319.03 and 3,991.20

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Solution

The fourth proportional to 12,877.90, 19,319.03 and 3,991.20 is: 5,987.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,877.90 : 19,319.03 = 3,991.20 : x
  2. Step 2: Convert to fraction form
    12,877.90/19,319.03 = 3,991.20/x
  3. Step 3: Cross multiply
    12,877.90x = 19,319.03 × 3,991.20
  4. Step 4: Simplify right side
    12,877.90x = 77,106,112.54
  5. Step 5: Solve for x
    x = 77,106,112.54/12,877.90
  6. Step 6: Final answer
    x = 5,987.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.