Home / 21,681.16-29,924.83-13,181.49

Finding the Fourth Proportional to 21,681.16, 29,924.83 and 13,181.49

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Solution

The fourth proportional to 21,681.16, 29,924.83 and 13,181.49 is: 18,193.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.16 : 29,924.83 = 13,181.49 : x
  2. Step 2: Convert to fraction form
    21,681.16/29,924.83 = 13,181.49/x
  3. Step 3: Cross multiply
    21,681.16x = 29,924.83 × 13,181.49
  4. Step 4: Simplify right side
    21,681.16x = 394,453,730.73
  5. Step 5: Solve for x
    x = 394,453,730.73/21,681.16
  6. Step 6: Final answer
    x = 18,193.39

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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.