Home / 9,100.20-12,558.85-5,121.68

Finding the Fourth Proportional to 9,100.20, 12,558.85 and 5,121.68

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Solution

The fourth proportional to 9,100.20, 12,558.85 and 5,121.68 is: 7,068.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,100.20 : 12,558.85 = 5,121.68 : x
  2. Step 2: Convert to fraction form
    9,100.20/12,558.85 = 5,121.68/x
  3. Step 3: Cross multiply
    9,100.20x = 12,558.85 × 5,121.68
  4. Step 4: Simplify right side
    9,100.20x = 64,322,405.91
  5. Step 5: Solve for x
    x = 64,322,405.91/9,100.20
  6. Step 6: Final answer
    x = 7,068.24

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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.