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Finding the Fourth Proportional to 21,353.69, 29,466.09 and 12,401.01

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Solution

The fourth proportional to 21,353.69, 29,466.09 and 12,401.01 is: 17,112.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,353.69 : 29,466.09 = 12,401.01 : x
  2. Step 2: Convert to fraction form
    21,353.69/29,466.09 = 12,401.01/x
  3. Step 3: Cross multiply
    21,353.69x = 29,466.09 × 12,401.01
  4. Step 4: Simplify right side
    21,353.69x = 365,409,276.75
  5. Step 5: Solve for x
    x = 365,409,276.75/21,353.69
  6. Step 6: Final answer
    x = 17,112.23

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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.