Home / 21,961.68-30,307.01-11,890.01

Finding the Fourth Proportional to 21,961.68, 30,307.01 and 11,890.01

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Solution

The fourth proportional to 21,961.68, 30,307.01 and 11,890.01 is: 16,408.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,961.68 : 30,307.01 = 11,890.01 : x
  2. Step 2: Convert to fraction form
    21,961.68/30,307.01 = 11,890.01/x
  3. Step 3: Cross multiply
    21,961.68x = 30,307.01 × 11,890.01
  4. Step 4: Simplify right side
    21,961.68x = 360,350,440.99
  5. Step 5: Solve for x
    x = 360,350,440.99/21,961.68
  6. Step 6: Final answer
    x = 16,408.15

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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.