Home / 12,686.25-19,031.19-3,921.84

Finding the Fourth Proportional to 12,686.25, 19,031.19 and 3,921.84

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Solution

The fourth proportional to 12,686.25, 19,031.19 and 3,921.84 is: 5,883.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.25 : 19,031.19 = 3,921.84 : x
  2. Step 2: Convert to fraction form
    12,686.25/19,031.19 = 3,921.84/x
  3. Step 3: Cross multiply
    12,686.25x = 19,031.19 × 3,921.84
  4. Step 4: Simplify right side
    12,686.25x = 74,637,368.26
  5. Step 5: Solve for x
    x = 74,637,368.26/12,686.25
  6. Step 6: Final answer
    x = 5,883.33

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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.