Home / 19,105.94-28,660.74-7,420.07

Finding the Fourth Proportional to 19,105.94, 28,660.74 and 7,420.07

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Solution

The fourth proportional to 19,105.94, 28,660.74 and 7,420.07 is: 11,130.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,105.94 : 28,660.74 = 7,420.07 : x
  2. Step 2: Convert to fraction form
    19,105.94/28,660.74 = 7,420.07/x
  3. Step 3: Cross multiply
    19,105.94x = 28,660.74 × 7,420.07
  4. Step 4: Simplify right side
    19,105.94x = 212,664,740.88
  5. Step 5: Solve for x
    x = 212,664,740.88/19,105.94
  6. Step 6: Final answer
    x = 11,130.82

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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.