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Finding the Fourth Proportional to 12,710.88, 17,541.22 and 7,121.88

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Solution

The fourth proportional to 12,710.88, 17,541.22 and 7,121.88 is: 9,828.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,710.88 : 17,541.22 = 7,121.88 : x
  2. Step 2: Convert to fraction form
    12,710.88/17,541.22 = 7,121.88/x
  3. Step 3: Cross multiply
    12,710.88x = 17,541.22 × 7,121.88
  4. Step 4: Simplify right side
    12,710.88x = 124,926,463.89
  5. Step 5: Solve for x
    x = 124,926,463.89/12,710.88
  6. Step 6: Final answer
    x = 9,828.31

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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.