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Finding the Fourth Proportional to 18,001.10, 26,981.40 and 8,645.60

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Solution

The fourth proportional to 18,001.10, 26,981.40 and 8,645.60 is: 12,958.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,001.10 : 26,981.40 = 8,645.60 : x
  2. Step 2: Convert to fraction form
    18,001.10/26,981.40 = 8,645.60/x
  3. Step 3: Cross multiply
    18,001.10x = 26,981.40 × 8,645.60
  4. Step 4: Simplify right side
    18,001.10x = 233,270,391.84
  5. Step 5: Solve for x
    x = 233,270,391.84/18,001.10
  6. Step 6: Final answer
    x = 12,958.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.