Home / 21,618.73-29,829.31-13,125.32

Finding the Fourth Proportional to 21,618.73, 29,829.31 and 13,125.32

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Solution

The fourth proportional to 21,618.73, 29,829.31 and 13,125.32 is: 18,110.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618.73 : 29,829.31 = 13,125.32 : x
  2. Step 2: Convert to fraction form
    21,618.73/29,829.31 = 13,125.32/x
  3. Step 3: Cross multiply
    21,618.73x = 29,829.31 × 13,125.32
  4. Step 4: Simplify right side
    21,618.73x = 391,519,410.65
  5. Step 5: Solve for x
    x = 391,519,410.65/21,618.73
  6. Step 6: Final answer
    x = 18,110.19

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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.