Home / 13,728.08-18,944.75-7,440.45

Finding the Fourth Proportional to 13,728.08, 18,944.75 and 7,440.45

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Solution

The fourth proportional to 13,728.08, 18,944.75 and 7,440.45 is: 10,267.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.08 : 18,944.75 = 7,440.45 : x
  2. Step 2: Convert to fraction form
    13,728.08/18,944.75 = 7,440.45/x
  3. Step 3: Cross multiply
    13,728.08x = 18,944.75 × 7,440.45
  4. Step 4: Simplify right side
    13,728.08x = 140,957,427.94
  5. Step 5: Solve for x
    x = 140,957,427.94/13,728.08
  6. Step 6: Final answer
    x = 10,267.82

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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.