Home / 10,209.60-15,285.60-9,172.80

Finding the Fourth Proportional to 10,209.60, 15,285.60 and 9,172.80

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Solution

The fourth proportional to 10,209.60, 15,285.60 and 9,172.80 is: 13,733.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,209.60 : 15,285.60 = 9,172.80 : x
  2. Step 2: Convert to fraction form
    10,209.60/15,285.60 = 9,172.80/x
  3. Step 3: Cross multiply
    10,209.60x = 15,285.60 × 9,172.80
  4. Step 4: Simplify right side
    10,209.60x = 140,211,751.68
  5. Step 5: Solve for x
    x = 140,211,751.68/10,209.60
  6. Step 6: Final answer
    x = 13,733.32

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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.