Home / 8,659.07-12,989.51-3,978.28

Finding the Fourth Proportional to 8,659.07, 12,989.51 and 3,978.28

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Solution

The fourth proportional to 8,659.07, 12,989.51 and 3,978.28 is: 5,967.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.07 : 12,989.51 = 3,978.28 : x
  2. Step 2: Convert to fraction form
    8,659.07/12,989.51 = 3,978.28/x
  3. Step 3: Cross multiply
    8,659.07x = 12,989.51 × 3,978.28
  4. Step 4: Simplify right side
    8,659.07x = 51,675,907.84
  5. Step 5: Solve for x
    x = 51,675,907.84/8,659.07
  6. Step 6: Final answer
    x = 5,967.84

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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.