Home / 9,215.80-12,720.60-8,745.64

Finding the Fourth Proportional to 9,215.80, 12,720.60 and 8,745.64

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Solution

The fourth proportional to 9,215.80, 12,720.60 and 8,745.64 is: 12,071.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,215.80 : 12,720.60 = 8,745.64 : x
  2. Step 2: Convert to fraction form
    9,215.80/12,720.60 = 8,745.64/x
  3. Step 3: Cross multiply
    9,215.80x = 12,720.60 × 8,745.64
  4. Step 4: Simplify right side
    9,215.80x = 111,249,788.18
  5. Step 5: Solve for x
    x = 111,249,788.18/9,215.80
  6. Step 6: Final answer
    x = 12,071.64

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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.