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Finding the Fourth Proportional to 13,809.64, 20,710.98 and 3,948.97

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Solution

The fourth proportional to 13,809.64, 20,710.98 and 3,948.97 is: 5,922.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,809.64 : 20,710.98 = 3,948.97 : x
  2. Step 2: Convert to fraction form
    13,809.64/20,710.98 = 3,948.97/x
  3. Step 3: Cross multiply
    13,809.64x = 20,710.98 × 3,948.97
  4. Step 4: Simplify right side
    13,809.64x = 81,787,038.69
  5. Step 5: Solve for x
    x = 81,787,038.69/13,809.64
  6. Step 6: Final answer
    x = 5,922.46

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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.