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Finding the Fourth Proportional to 12,840.84, 17,721.75 and 7,536.42

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Solution

The fourth proportional to 12,840.84, 17,721.75 and 7,536.42 is: 10,401.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.84 : 17,721.75 = 7,536.42 : x
  2. Step 2: Convert to fraction form
    12,840.84/17,721.75 = 7,536.42/x
  3. Step 3: Cross multiply
    12,840.84x = 17,721.75 × 7,536.42
  4. Step 4: Simplify right side
    12,840.84x = 133,558,551.14
  5. Step 5: Solve for x
    x = 133,558,551.14/12,840.84
  6. Step 6: Final answer
    x = 10,401.08

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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.