Home / 13,971.20-20,913.60-8,110.40

Finding the Fourth Proportional to 13,971.20, 20,913.60 and 8,110.40

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Solution

The fourth proportional to 13,971.20, 20,913.60 and 8,110.40 is: 12,140.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,971.20 : 20,913.60 = 8,110.40 : x
  2. Step 2: Convert to fraction form
    13,971.20/20,913.60 = 8,110.40/x
  3. Step 3: Cross multiply
    13,971.20x = 20,913.60 × 8,110.40
  4. Step 4: Simplify right side
    13,971.20x = 169,617,661.44
  5. Step 5: Solve for x
    x = 169,617,661.44/13,971.20
  6. Step 6: Final answer
    x = 12,140.52

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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.