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Finding the Fourth Proportional to 21,710.63, 29,956.03 and 12,754.87

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Solution

The fourth proportional to 21,710.63, 29,956.03 and 12,754.87 is: 17,598.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.63 : 29,956.03 = 12,754.87 : x
  2. Step 2: Convert to fraction form
    21,710.63/29,956.03 = 12,754.87/x
  3. Step 3: Cross multiply
    21,710.63x = 29,956.03 × 12,754.87
  4. Step 4: Simplify right side
    21,710.63x = 382,085,161.59
  5. Step 5: Solve for x
    x = 382,085,161.59/21,710.63
  6. Step 6: Final answer
    x = 17,598.99

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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.