Home / 9,639.30-13,286.85-7,867.86

Finding the Fourth Proportional to 9,639.30, 13,286.85 and 7,867.86

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Solution

The fourth proportional to 9,639.30, 13,286.85 and 7,867.86 is: 10,845.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,639.30 : 13,286.85 = 7,867.86 : x
  2. Step 2: Convert to fraction form
    9,639.30/13,286.85 = 7,867.86/x
  3. Step 3: Cross multiply
    9,639.30x = 13,286.85 × 7,867.86
  4. Step 4: Simplify right side
    9,639.30x = 104,539,075.64
  5. Step 5: Solve for x
    x = 104,539,075.64/9,639.30
  6. Step 6: Final answer
    x = 10,845.09

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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.