Home / 9,351.20-12,904.80-5,159.60

Finding the Fourth Proportional to 9,351.20, 12,904.80 and 5,159.60

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Solution

The fourth proportional to 9,351.20, 12,904.80 and 5,159.60 is: 7,120.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,351.20 : 12,904.80 = 5,159.60 : x
  2. Step 2: Convert to fraction form
    9,351.20/12,904.80 = 5,159.60/x
  3. Step 3: Cross multiply
    9,351.20x = 12,904.80 × 5,159.60
  4. Step 4: Simplify right side
    9,351.20x = 66,583,606.08
  5. Step 5: Solve for x
    x = 66,583,606.08/9,351.20
  6. Step 6: Final answer
    x = 7,120.33

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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.