Home / 13,867.20-19,135.44-7,900.20

Finding the Fourth Proportional to 13,867.20, 19,135.44 and 7,900.20

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Solution

The fourth proportional to 13,867.20, 19,135.44 and 7,900.20 is: 10,901.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,867.20 : 19,135.44 = 7,900.20 : x
  2. Step 2: Convert to fraction form
    13,867.20/19,135.44 = 7,900.20/x
  3. Step 3: Cross multiply
    13,867.20x = 19,135.44 × 7,900.20
  4. Step 4: Simplify right side
    13,867.20x = 151,173,803.09
  5. Step 5: Solve for x
    x = 151,173,803.09/13,867.20
  6. Step 6: Final answer
    x = 10,901.54

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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.