Home / 21,401.21-29,535.23-11,972.81

Finding the Fourth Proportional to 21,401.21, 29,535.23 and 11,972.81

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Solution

The fourth proportional to 21,401.21, 29,535.23 and 11,972.81 is: 16,523.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,401.21 : 29,535.23 = 11,972.81 : x
  2. Step 2: Convert to fraction form
    21,401.21/29,535.23 = 11,972.81/x
  3. Step 3: Cross multiply
    21,401.21x = 29,535.23 × 11,972.81
  4. Step 4: Simplify right side
    21,401.21x = 353,619,697.10
  5. Step 5: Solve for x
    x = 353,619,697.10/21,401.21
  6. Step 6: Final answer
    x = 16,523.35

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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.