Home / 21,514.21-29,681.30-15,862.39

Finding the Fourth Proportional to 21,514.21, 29,681.30 and 15,862.39

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Solution

The fourth proportional to 21,514.21, 29,681.30 and 15,862.39 is: 21,883.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,514.21 : 29,681.30 = 15,862.39 : x
  2. Step 2: Convert to fraction form
    21,514.21/29,681.30 = 15,862.39/x
  3. Step 3: Cross multiply
    21,514.21x = 29,681.30 × 15,862.39
  4. Step 4: Simplify right side
    21,514.21x = 470,816,321.76
  5. Step 5: Solve for x
    x = 470,816,321.76/21,514.21
  6. Step 6: Final answer
    x = 21,883.97

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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.