Home / 21,878.24-30,185.44-12,926.56

Finding the Fourth Proportional to 21,878.24, 30,185.44 and 12,926.56

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Solution

The fourth proportional to 21,878.24, 30,185.44 and 12,926.56 is: 17,834.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,878.24 : 30,185.44 = 12,926.56 : x
  2. Step 2: Convert to fraction form
    21,878.24/30,185.44 = 12,926.56/x
  3. Step 3: Cross multiply
    21,878.24x = 30,185.44 × 12,926.56
  4. Step 4: Simplify right side
    21,878.24x = 390,193,901.29
  5. Step 5: Solve for x
    x = 390,193,901.29/21,878.24
  6. Step 6: Final answer
    x = 17,834.79

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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.