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Finding the Fourth Proportional to 7,003.76, 9,666.60 and 4,021.64

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Solution

The fourth proportional to 7,003.76, 9,666.60 and 4,021.64 is: 5,550.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,003.76 : 9,666.60 = 4,021.64 : x
  2. Step 2: Convert to fraction form
    7,003.76/9,666.60 = 4,021.64/x
  3. Step 3: Cross multiply
    7,003.76x = 9,666.60 × 4,021.64
  4. Step 4: Simplify right side
    7,003.76x = 38,875,536.89
  5. Step 5: Solve for x
    x = 38,875,536.89/7,003.76
  6. Step 6: Final answer
    x = 5,550.67

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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.