Home / 13,780.12-20,670.72-7,201.84

Finding the Fourth Proportional to 13,780.12, 20,670.72 and 7,201.84

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Solution

The fourth proportional to 13,780.12, 20,670.72 and 7,201.84 is: 10,803.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.12 : 20,670.72 = 7,201.84 : x
  2. Step 2: Convert to fraction form
    13,780.12/20,670.72 = 7,201.84/x
  3. Step 3: Cross multiply
    13,780.12x = 20,670.72 × 7,201.84
  4. Step 4: Simplify right side
    13,780.12x = 148,867,218.12
  5. Step 5: Solve for x
    x = 148,867,218.12/13,780.12
  6. Step 6: Final answer
    x = 10,803.04

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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.