Home / 12,900.45-19,350.98-7,313.88

Finding the Fourth Proportional to 12,900.45, 19,350.98 and 7,313.88

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Solution

The fourth proportional to 12,900.45, 19,350.98 and 7,313.88 is: 10,970.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.45 : 19,350.98 = 7,313.88 : x
  2. Step 2: Convert to fraction form
    12,900.45/19,350.98 = 7,313.88/x
  3. Step 3: Cross multiply
    12,900.45x = 19,350.98 × 7,313.88
  4. Step 4: Simplify right side
    12,900.45x = 141,530,745.60
  5. Step 5: Solve for x
    x = 141,530,745.60/12,900.45
  6. Step 6: Final answer
    x = 10,970.99

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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.