Home / 20,551.73-28,354.46-13,378.37

Finding the Fourth Proportional to 20,551.73, 28,354.46 and 13,378.37

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Solution

The fourth proportional to 20,551.73, 28,354.46 and 13,378.37 is: 18,457.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.73 : 28,354.46 = 13,378.37 : x
  2. Step 2: Convert to fraction form
    20,551.73/28,354.46 = 13,378.37/x
  3. Step 3: Cross multiply
    20,551.73x = 28,354.46 × 13,378.37
  4. Step 4: Simplify right side
    20,551.73x = 379,336,248.37
  5. Step 5: Solve for x
    x = 379,336,248.37/20,551.73
  6. Step 6: Final answer
    x = 18,457.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.