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Finding the Fourth Proportional to 8,505.95, 11,725.16 and 5,521.31

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Solution

The fourth proportional to 8,505.95, 11,725.16 and 5,521.31 is: 7,610.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.95 : 11,725.16 = 5,521.31 : x
  2. Step 2: Convert to fraction form
    8,505.95/11,725.16 = 5,521.31/x
  3. Step 3: Cross multiply
    8,505.95x = 11,725.16 × 5,521.31
  4. Step 4: Simplify right side
    8,505.95x = 64,738,215.55
  5. Step 5: Solve for x
    x = 64,738,215.55/8,505.95
  6. Step 6: Final answer
    x = 7,610.93

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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.