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Finding the Fourth Proportional to 13,938.06, 20,908.94 and 7,364.51

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Solution

The fourth proportional to 13,938.06, 20,908.94 and 7,364.51 is: 11,047.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.06 : 20,908.94 = 7,364.51 : x
  2. Step 2: Convert to fraction form
    13,938.06/20,908.94 = 7,364.51/x
  3. Step 3: Cross multiply
    13,938.06x = 20,908.94 × 7,364.51
  4. Step 4: Simplify right side
    13,938.06x = 153,983,956.35
  5. Step 5: Solve for x
    x = 153,983,956.35/13,938.06
  6. Step 6: Final answer
    x = 11,047.73

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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.