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Finding the Fourth Proportional to 18,854.97, 25,995.09 and 15,670.99

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Solution

The fourth proportional to 18,854.97, 25,995.09 and 15,670.99 is: 21,605.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.97 : 25,995.09 = 15,670.99 : x
  2. Step 2: Convert to fraction form
    18,854.97/25,995.09 = 15,670.99/x
  3. Step 3: Cross multiply
    18,854.97x = 25,995.09 × 15,670.99
  4. Step 4: Simplify right side
    18,854.97x = 407,368,795.44
  5. Step 5: Solve for x
    x = 407,368,795.44/18,854.97
  6. Step 6: Final answer
    x = 21,605.38

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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.