Home / 21,911-30,237.18-12,485.03

Finding the Fourth Proportional to 21,911, 30,237.18 and 12,485.03

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Solution

The fourth proportional to 21,911, 30,237.18 and 12,485.03 is: 17,229.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911 : 30,237.18 = 12,485.03 : x
  2. Step 2: Convert to fraction form
    21,911/30,237.18 = 12,485.03/x
  3. Step 3: Cross multiply
    21,911x = 30,237.18 × 12,485.03
  4. Step 4: Simplify right side
    21,911x = 377,512,099.42
  5. Step 5: Solve for x
    x = 377,512,099.42/21,911
  6. Step 6: Final answer
    x = 17,229.34

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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.