Home / 21,981.46-30,332.57-12,422.18

Finding the Fourth Proportional to 21,981.46, 30,332.57 and 12,422.18

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Solution

The fourth proportional to 21,981.46, 30,332.57 and 12,422.18 is: 17,141.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.46 : 30,332.57 = 12,422.18 : x
  2. Step 2: Convert to fraction form
    21,981.46/30,332.57 = 12,422.18/x
  3. Step 3: Cross multiply
    21,981.46x = 30,332.57 × 12,422.18
  4. Step 4: Simplify right side
    21,981.46x = 376,796,644.40
  5. Step 5: Solve for x
    x = 376,796,644.40/21,981.46
  6. Step 6: Final answer
    x = 17,141.57

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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.