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Finding the Fourth Proportional to 13,946, 20,920.20 and 3,557.72

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Solution

The fourth proportional to 13,946, 20,920.20 and 3,557.72 is: 5,336.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,946 : 20,920.20 = 3,557.72 : x
  2. Step 2: Convert to fraction form
    13,946/20,920.20 = 3,557.72/x
  3. Step 3: Cross multiply
    13,946x = 20,920.20 × 3,557.72
  4. Step 4: Simplify right side
    13,946x = 74,428,213.94
  5. Step 5: Solve for x
    x = 74,428,213.94/13,946
  6. Step 6: Final answer
    x = 5,336.89

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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.