Home / 13,695.49-18,900.66-7,724.98

Finding the Fourth Proportional to 13,695.49, 18,900.66 and 7,724.98

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Solution

The fourth proportional to 13,695.49, 18,900.66 and 7,724.98 is: 10,660.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.49 : 18,900.66 = 7,724.98 : x
  2. Step 2: Convert to fraction form
    13,695.49/18,900.66 = 7,724.98/x
  3. Step 3: Cross multiply
    13,695.49x = 18,900.66 × 7,724.98
  4. Step 4: Simplify right side
    13,695.49x = 146,007,220.49
  5. Step 5: Solve for x
    x = 146,007,220.49/13,695.49
  6. Step 6: Final answer
    x = 10,660.97

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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.