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Finding the Fourth Proportional to 18,741.36, 25,833.03 and 12,689.67

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Solution

The fourth proportional to 18,741.36, 25,833.03 and 12,689.67 is: 17,491.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,741.36 : 25,833.03 = 12,689.67 : x
  2. Step 2: Convert to fraction form
    18,741.36/25,833.03 = 12,689.67/x
  3. Step 3: Cross multiply
    18,741.36x = 25,833.03 × 12,689.67
  4. Step 4: Simplify right side
    18,741.36x = 327,812,625.80
  5. Step 5: Solve for x
    x = 327,812,625.80/18,741.36
  6. Step 6: Final answer
    x = 17,491.40

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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.