Home / 8,904.56-12,288.58-5,128.94

Finding the Fourth Proportional to 8,904.56, 12,288.58 and 5,128.94

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Solution

The fourth proportional to 8,904.56, 12,288.58 and 5,128.94 is: 7,078.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,904.56 : 12,288.58 = 5,128.94 : x
  2. Step 2: Convert to fraction form
    8,904.56/12,288.58 = 5,128.94/x
  3. Step 3: Cross multiply
    8,904.56x = 12,288.58 × 5,128.94
  4. Step 4: Simplify right side
    8,904.56x = 63,027,407.40
  5. Step 5: Solve for x
    x = 63,027,407.40/8,904.56
  6. Step 6: Final answer
    x = 7,078.11

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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.