Home / 13,160.80-19,728.60-4,391.20

Finding the Fourth Proportional to 13,160.80, 19,728.60 and 4,391.20

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Solution

The fourth proportional to 13,160.80, 19,728.60 and 4,391.20 is: 6,582.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,160.80 : 19,728.60 = 4,391.20 : x
  2. Step 2: Convert to fraction form
    13,160.80/19,728.60 = 4,391.20/x
  3. Step 3: Cross multiply
    13,160.80x = 19,728.60 × 4,391.20
  4. Step 4: Simplify right side
    13,160.80x = 86,632,228.32
  5. Step 5: Solve for x
    x = 86,632,228.32/13,160.80
  6. Step 6: Final answer
    x = 6,582.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.