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Finding the Fourth Proportional to 6,645.51, 9,955.31 and 5,177.79

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Solution

The fourth proportional to 6,645.51, 9,955.31 and 5,177.79 is: 7,756.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.51 : 9,955.31 = 5,177.79 : x
  2. Step 2: Convert to fraction form
    6,645.51/9,955.31 = 5,177.79/x
  3. Step 3: Cross multiply
    6,645.51x = 9,955.31 × 5,177.79
  4. Step 4: Simplify right side
    6,645.51x = 51,546,478.68
  5. Step 5: Solve for x
    x = 51,546,478.68/6,645.51
  6. Step 6: Final answer
    x = 7,756.59

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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.