Home / 13,880.55-20,830.05-6,485.58

Finding the Fourth Proportional to 13,880.55, 20,830.05 and 6,485.58

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Solution

The fourth proportional to 13,880.55, 20,830.05 and 6,485.58 is: 9,732.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.55 : 20,830.05 = 6,485.58 : x
  2. Step 2: Convert to fraction form
    13,880.55/20,830.05 = 6,485.58/x
  3. Step 3: Cross multiply
    13,880.55x = 20,830.05 × 6,485.58
  4. Step 4: Simplify right side
    13,880.55x = 135,094,975.33
  5. Step 5: Solve for x
    x = 135,094,975.33/13,880.55
  6. Step 6: Final answer
    x = 9,732.69

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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.