Home / 18,490.50-25,516.89-11,878.02

Finding the Fourth Proportional to 18,490.50, 25,516.89 and 11,878.02

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Solution

The fourth proportional to 18,490.50, 25,516.89 and 11,878.02 is: 16,391.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,490.50 : 25,516.89 = 11,878.02 : x
  2. Step 2: Convert to fraction form
    18,490.50/25,516.89 = 11,878.02/x
  3. Step 3: Cross multiply
    18,490.50x = 25,516.89 × 11,878.02
  4. Step 4: Simplify right side
    18,490.50x = 303,090,129.76
  5. Step 5: Solve for x
    x = 303,090,129.76/18,490.50
  6. Step 6: Final answer
    x = 16,391.67

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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.