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Finding the Fourth Proportional to 8,620.84, 11,889.54 and 5,303.08

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Solution

The fourth proportional to 8,620.84, 11,889.54 and 5,303.08 is: 7,313.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.84 : 11,889.54 = 5,303.08 : x
  2. Step 2: Convert to fraction form
    8,620.84/11,889.54 = 5,303.08/x
  3. Step 3: Cross multiply
    8,620.84x = 11,889.54 × 5,303.08
  4. Step 4: Simplify right side
    8,620.84x = 63,051,181.78
  5. Step 5: Solve for x
    x = 63,051,181.78/8,620.84
  6. Step 6: Final answer
    x = 7,313.81

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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.