Home / 21,333.78-31,972.32-11,336.40

Finding the Fourth Proportional to 21,333.78, 31,972.32 and 11,336.40

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Solution

The fourth proportional to 21,333.78, 31,972.32 and 11,336.40 is: 16,989.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,333.78 : 31,972.32 = 11,336.40 : x
  2. Step 2: Convert to fraction form
    21,333.78/31,972.32 = 11,336.40/x
  3. Step 3: Cross multiply
    21,333.78x = 31,972.32 × 11,336.40
  4. Step 4: Simplify right side
    21,333.78x = 362,451,008.45
  5. Step 5: Solve for x
    x = 362,451,008.45/21,333.78
  6. Step 6: Final answer
    x = 16,989.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.