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Finding the Fourth Proportional to 13,903.71, 20,855.58 and 3,515.46

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Solution

The fourth proportional to 13,903.71, 20,855.58 and 3,515.46 is: 5,273.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.71 : 20,855.58 = 3,515.46 : x
  2. Step 2: Convert to fraction form
    13,903.71/20,855.58 = 3,515.46/x
  3. Step 3: Cross multiply
    13,903.71x = 20,855.58 × 3,515.46
  4. Step 4: Simplify right side
    13,903.71x = 73,316,957.27
  5. Step 5: Solve for x
    x = 73,316,957.27/13,903.71
  6. Step 6: Final answer
    x = 5,273.19

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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.