Home / 21,881.52-30,186-14,325.12

Finding the Fourth Proportional to 21,881.52, 30,186 and 14,325.12

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Solution

The fourth proportional to 21,881.52, 30,186 and 14,325.12 is: 19,761.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,881.52 : 30,186 = 14,325.12 : x
  2. Step 2: Convert to fraction form
    21,881.52/30,186 = 14,325.12/x
  3. Step 3: Cross multiply
    21,881.52x = 30,186 × 14,325.12
  4. Step 4: Simplify right side
    21,881.52x = 432,418,072.32
  5. Step 5: Solve for x
    x = 432,418,072.32/21,881.52
  6. Step 6: Final answer
    x = 19,761.79

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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.