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Finding the Fourth Proportional to 21,142.04, 31,713.06 and 7,291.04

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Solution

The fourth proportional to 21,142.04, 31,713.06 and 7,291.04 is: 10,936.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.04 : 31,713.06 = 7,291.04 : x
  2. Step 2: Convert to fraction form
    21,142.04/31,713.06 = 7,291.04/x
  3. Step 3: Cross multiply
    21,142.04x = 31,713.06 × 7,291.04
  4. Step 4: Simplify right side
    21,142.04x = 231,221,188.98
  5. Step 5: Solve for x
    x = 231,221,188.98/21,142.04
  6. Step 6: Final answer
    x = 10,936.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.