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Finding the Fourth Proportional to 7,409.79, 11,116.49 and 5,222.79

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Solution

The fourth proportional to 7,409.79, 11,116.49 and 5,222.79 is: 7,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,409.79 : 11,116.49 = 5,222.79 : x
  2. Step 2: Convert to fraction form
    7,409.79/11,116.49 = 5,222.79/x
  3. Step 3: Cross multiply
    7,409.79x = 11,116.49 × 5,222.79
  4. Step 4: Simplify right side
    7,409.79x = 58,059,066.69
  5. Step 5: Solve for x
    x = 58,059,066.69/7,409.79
  6. Step 6: Final answer
    x = 7,835.45

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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.