Home / 18,664.50-25,758.23-12,378.09

Finding the Fourth Proportional to 18,664.50, 25,758.23 and 12,378.09

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Solution

The fourth proportional to 18,664.50, 25,758.23 and 12,378.09 is: 17,082.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,664.50 : 25,758.23 = 12,378.09 : x
  2. Step 2: Convert to fraction form
    18,664.50/25,758.23 = 12,378.09/x
  3. Step 3: Cross multiply
    18,664.50x = 25,758.23 × 12,378.09
  4. Step 4: Simplify right side
    18,664.50x = 318,837,627.29
  5. Step 5: Solve for x
    x = 318,837,627.29/18,664.50
  6. Step 6: Final answer
    x = 17,082.57

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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.