Home / 21,574.68-29,786.73-13,511.55

Finding the Fourth Proportional to 21,574.68, 29,786.73 and 13,511.55

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Solution

The fourth proportional to 21,574.68, 29,786.73 and 13,511.55 is: 18,654.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,574.68 : 29,786.73 = 13,511.55 : x
  2. Step 2: Convert to fraction form
    21,574.68/29,786.73 = 13,511.55/x
  3. Step 3: Cross multiply
    21,574.68x = 29,786.73 × 13,511.55
  4. Step 4: Simplify right side
    21,574.68x = 402,464,891.73
  5. Step 5: Solve for x
    x = 402,464,891.73/21,574.68
  6. Step 6: Final answer
    x = 18,654.50

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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.