Home / 9,078.90-12,530.34-8,485.98

Finding the Fourth Proportional to 9,078.90, 12,530.34 and 8,485.98

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Solution

The fourth proportional to 9,078.90, 12,530.34 and 8,485.98 is: 11,712.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,078.90 : 12,530.34 = 8,485.98 : x
  2. Step 2: Convert to fraction form
    9,078.90/12,530.34 = 8,485.98/x
  3. Step 3: Cross multiply
    9,078.90x = 12,530.34 × 8,485.98
  4. Step 4: Simplify right side
    9,078.90x = 106,332,214.63
  5. Step 5: Solve for x
    x = 106,332,214.63/9,078.90
  6. Step 6: Final answer
    x = 11,712.02

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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.