Home / 20,989.42-28,962.33-11,913.37

Finding the Fourth Proportional to 20,989.42, 28,962.33 and 11,913.37

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Solution

The fourth proportional to 20,989.42, 28,962.33 and 11,913.37 is: 16,438.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.42 : 28,962.33 = 11,913.37 : x
  2. Step 2: Convert to fraction form
    20,989.42/28,962.33 = 11,913.37/x
  3. Step 3: Cross multiply
    20,989.42x = 28,962.33 × 11,913.37
  4. Step 4: Simplify right side
    20,989.42x = 345,038,953.35
  5. Step 5: Solve for x
    x = 345,038,953.35/20,989.42
  6. Step 6: Final answer
    x = 16,438.71

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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.