Home / 13,955.40-20,936.52-6,938.72

Finding the Fourth Proportional to 13,955.40, 20,936.52 and 6,938.72

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Solution

The fourth proportional to 13,955.40, 20,936.52 and 6,938.72 is: 10,409.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,955.40 : 20,936.52 = 6,938.72 : x
  2. Step 2: Convert to fraction form
    13,955.40/20,936.52 = 6,938.72/x
  3. Step 3: Cross multiply
    13,955.40x = 20,936.52 × 6,938.72
  4. Step 4: Simplify right side
    13,955.40x = 145,272,650.05
  5. Step 5: Solve for x
    x = 145,272,650.05/13,955.40
  6. Step 6: Final answer
    x = 10,409.78

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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.