Home / 13,770.75-20,748.71-12,455.99

Finding the Fourth Proportional to 13,770.75, 20,748.71 and 12,455.99

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Solution

The fourth proportional to 13,770.75, 20,748.71 and 12,455.99 is: 18,767.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,770.75 : 20,748.71 = 12,455.99 : x
  2. Step 2: Convert to fraction form
    13,770.75/20,748.71 = 12,455.99/x
  3. Step 3: Cross multiply
    13,770.75x = 20,748.71 × 12,455.99
  4. Step 4: Simplify right side
    13,770.75x = 258,445,558.25
  5. Step 5: Solve for x
    x = 258,445,558.25/13,770.75
  6. Step 6: Final answer
    x = 18,767.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.