Home / 5,256.40-7,880.60-2,661.20

Finding the Fourth Proportional to 5,256.40, 7,880.60 and 2,661.20

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Solution

The fourth proportional to 5,256.40, 7,880.60 and 2,661.20 is: 3,989.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,256.40 : 7,880.60 = 2,661.20 : x
  2. Step 2: Convert to fraction form
    5,256.40/7,880.60 = 2,661.20/x
  3. Step 3: Cross multiply
    5,256.40x = 7,880.60 × 2,661.20
  4. Step 4: Simplify right side
    5,256.40x = 20,971,852.72
  5. Step 5: Solve for x
    x = 20,971,852.72/5,256.40
  6. Step 6: Final answer
    x = 3,989.77

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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.