Home / 21,515.22-29,682.45-13,136.58

Finding the Fourth Proportional to 21,515.22, 29,682.45 and 13,136.58

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Solution

The fourth proportional to 21,515.22, 29,682.45 and 13,136.58 is: 18,123.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.22 : 29,682.45 = 13,136.58 : x
  2. Step 2: Convert to fraction form
    21,515.22/29,682.45 = 13,136.58/x
  3. Step 3: Cross multiply
    21,515.22x = 29,682.45 × 13,136.58
  4. Step 4: Simplify right side
    21,515.22x = 389,925,879.02
  5. Step 5: Solve for x
    x = 389,925,879.02/21,515.22
  6. Step 6: Final answer
    x = 18,123.26

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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.