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Finding the Fourth Proportional to 21,607.64, 29,828.76 and 12,652.28

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Solution

The fourth proportional to 21,607.64, 29,828.76 and 12,652.28 is: 17,466.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,607.64 : 29,828.76 = 12,652.28 : x
  2. Step 2: Convert to fraction form
    21,607.64/29,828.76 = 12,652.28/x
  3. Step 3: Cross multiply
    21,607.64x = 29,828.76 × 12,652.28
  4. Step 4: Simplify right side
    21,607.64x = 377,401,823.57
  5. Step 5: Solve for x
    x = 377,401,823.57/21,607.64
  6. Step 6: Final answer
    x = 17,466.13

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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.