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Finding the Fourth Proportional to 18,795.81, 25,879.04 and 15,957.57

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Solution

The fourth proportional to 18,795.81, 25,879.04 and 15,957.57 is: 21,971.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,795.81 : 25,879.04 = 15,957.57 : x
  2. Step 2: Convert to fraction form
    18,795.81/25,879.04 = 15,957.57/x
  3. Step 3: Cross multiply
    18,795.81x = 25,879.04 × 15,957.57
  4. Step 4: Simplify right side
    18,795.81x = 412,966,632.23
  5. Step 5: Solve for x
    x = 412,966,632.23/18,795.81
  6. Step 6: Final answer
    x = 21,971.21

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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.