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Finding the Fourth Proportional to 18,955, 26,157.90 and 10,571.50

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Solution

The fourth proportional to 18,955, 26,157.90 and 10,571.50 is: 14,588.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955 : 26,157.90 = 10,571.50 : x
  2. Step 2: Convert to fraction form
    18,955/26,157.90 = 10,571.50/x
  3. Step 3: Cross multiply
    18,955x = 26,157.90 × 10,571.50
  4. Step 4: Simplify right side
    18,955x = 276,528,239.85
  5. Step 5: Solve for x
    x = 276,528,239.85/18,955
  6. Step 6: Final answer
    x = 14,588.67

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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.