Home / 12,780.20-19,173.48-10,157.60

Finding the Fourth Proportional to 12,780.20, 19,173.48 and 10,157.60

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Solution

The fourth proportional to 12,780.20, 19,173.48 and 10,157.60 is: 15,238.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.20 : 19,173.48 = 10,157.60 : x
  2. Step 2: Convert to fraction form
    12,780.20/19,173.48 = 10,157.60/x
  3. Step 3: Cross multiply
    12,780.20x = 19,173.48 × 10,157.60
  4. Step 4: Simplify right side
    12,780.20x = 194,756,540.45
  5. Step 5: Solve for x
    x = 194,756,540.45/12,780.20
  6. Step 6: Final answer
    x = 15,238.93

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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.