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Finding the Fourth Proportional to 21,034.84, 29,024.04 and 12,651.88

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Solution

The fourth proportional to 21,034.84, 29,024.04 and 12,651.88 is: 17,457.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,034.84 : 29,024.04 = 12,651.88 : x
  2. Step 2: Convert to fraction form
    21,034.84/29,024.04 = 12,651.88/x
  3. Step 3: Cross multiply
    21,034.84x = 29,024.04 × 12,651.88
  4. Step 4: Simplify right side
    21,034.84x = 367,208,671.20
  5. Step 5: Solve for x
    x = 367,208,671.20/21,034.84
  6. Step 6: Final answer
    x = 17,457.16

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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.