Home / 21,921.84-30,254.31-12,491.82

Finding the Fourth Proportional to 21,921.84, 30,254.31 and 12,491.82

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Solution

The fourth proportional to 21,921.84, 30,254.31 and 12,491.82 is: 17,239.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.84 : 30,254.31 = 12,491.82 : x
  2. Step 2: Convert to fraction form
    21,921.84/30,254.31 = 12,491.82/x
  3. Step 3: Cross multiply
    21,921.84x = 30,254.31 × 12,491.82
  4. Step 4: Simplify right side
    21,921.84x = 377,931,394.74
  5. Step 5: Solve for x
    x = 377,931,394.74/21,921.84
  6. Step 6: Final answer
    x = 17,239.95

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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.