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Finding the Fourth Proportional to 18,428.72, 25,431.68 and 10,471

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Solution

The fourth proportional to 18,428.72, 25,431.68 and 10,471 is: 14,450.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.72 : 25,431.68 = 10,471 : x
  2. Step 2: Convert to fraction form
    18,428.72/25,431.68 = 10,471/x
  3. Step 3: Cross multiply
    18,428.72x = 25,431.68 × 10,471
  4. Step 4: Simplify right side
    18,428.72x = 266,295,121.28
  5. Step 5: Solve for x
    x = 266,295,121.28/18,428.72
  6. Step 6: Final answer
    x = 14,450.01

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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.