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Finding the Fourth Proportional to 18,431, 25,434.78 and 10,047.56

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Solution

The fourth proportional to 18,431, 25,434.78 and 10,047.56 is: 13,865.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431 : 25,434.78 = 10,047.56 : x
  2. Step 2: Convert to fraction form
    18,431/25,434.78 = 10,047.56/x
  3. Step 3: Cross multiply
    18,431x = 25,434.78 × 10,047.56
  4. Step 4: Simplify right side
    18,431x = 255,557,478.14
  5. Step 5: Solve for x
    x = 255,557,478.14/18,431
  6. Step 6: Final answer
    x = 13,865.63

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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.