Home / 8,745.20-12,068.70-5,208.80

Finding the Fourth Proportional to 8,745.20, 12,068.70 and 5,208.80

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Solution

The fourth proportional to 8,745.20, 12,068.70 and 5,208.80 is: 7,188.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,745.20 : 12,068.70 = 5,208.80 : x
  2. Step 2: Convert to fraction form
    8,745.20/12,068.70 = 5,208.80/x
  3. Step 3: Cross multiply
    8,745.20x = 12,068.70 × 5,208.80
  4. Step 4: Simplify right side
    8,745.20x = 62,863,444.56
  5. Step 5: Solve for x
    x = 62,863,444.56/8,745.20
  6. Step 6: Final answer
    x = 7,188.34

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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.