Home / 19,919.82-29,868.79-13,681.40

Finding the Fourth Proportional to 19,919.82, 29,868.79 and 13,681.40

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Solution

The fourth proportional to 19,919.82, 29,868.79 and 13,681.40 is: 20,514.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,919.82 : 29,868.79 = 13,681.40 : x
  2. Step 2: Convert to fraction form
    19,919.82/29,868.79 = 13,681.40/x
  3. Step 3: Cross multiply
    19,919.82x = 29,868.79 × 13,681.40
  4. Step 4: Simplify right side
    19,919.82x = 408,646,822.32
  5. Step 5: Solve for x
    x = 408,646,822.32/19,919.82
  6. Step 6: Final answer
    x = 20,514.59

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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.