Home / 12,856.40-19,270.20-5,459.60

Finding the Fourth Proportional to 12,856.40, 19,270.20 and 5,459.60

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Solution

The fourth proportional to 12,856.40, 19,270.20 and 5,459.60 is: 8,183.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,856.40 : 19,270.20 = 5,459.60 : x
  2. Step 2: Convert to fraction form
    12,856.40/19,270.20 = 5,459.60/x
  3. Step 3: Cross multiply
    12,856.40x = 19,270.20 × 5,459.60
  4. Step 4: Simplify right side
    12,856.40x = 105,207,583.92
  5. Step 5: Solve for x
    x = 105,207,583.92/12,856.40
  6. Step 6: Final answer
    x = 8,183.28

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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.