Home / 9,418.60-13,028.61-8,780.32

Finding the Fourth Proportional to 9,418.60, 13,028.61 and 8,780.32

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Solution

The fourth proportional to 9,418.60, 13,028.61 and 8,780.32 is: 12,145.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,418.60 : 13,028.61 = 8,780.32 : x
  2. Step 2: Convert to fraction form
    9,418.60/13,028.61 = 8,780.32/x
  3. Step 3: Cross multiply
    9,418.60x = 13,028.61 × 8,780.32
  4. Step 4: Simplify right side
    9,418.60x = 114,395,364.96
  5. Step 5: Solve for x
    x = 114,395,364.96/9,418.60
  6. Step 6: Final answer
    x = 12,145.69

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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.