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Finding the Fourth Proportional to 7,999.80, 11,975.40 and 4,703.10

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Solution

The fourth proportional to 7,999.80, 11,975.40 and 4,703.10 is: 7,040.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.80 : 11,975.40 = 4,703.10 : x
  2. Step 2: Convert to fraction form
    7,999.80/11,975.40 = 4,703.10/x
  3. Step 3: Cross multiply
    7,999.80x = 11,975.40 × 4,703.10
  4. Step 4: Simplify right side
    7,999.80x = 56,321,503.74
  5. Step 5: Solve for x
    x = 56,321,503.74/7,999.80
  6. Step 6: Final answer
    x = 7,040.36

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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.