Home / 13,478.57-20,193.21-9,771.60

Finding the Fourth Proportional to 13,478.57, 20,193.21 and 9,771.60

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Solution

The fourth proportional to 13,478.57, 20,193.21 and 9,771.60 is: 14,639.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.57 : 20,193.21 = 9,771.60 : x
  2. Step 2: Convert to fraction form
    13,478.57/20,193.21 = 9,771.60/x
  3. Step 3: Cross multiply
    13,478.57x = 20,193.21 × 9,771.60
  4. Step 4: Simplify right side
    13,478.57x = 197,319,970.84
  5. Step 5: Solve for x
    x = 197,319,970.84/13,478.57
  6. Step 6: Final answer
    x = 14,639.54

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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.