Home / 5,276.22-7,915.20-1,989.60

Finding the Fourth Proportional to 5,276.22, 7,915.20 and 1,989.60

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Solution

The fourth proportional to 5,276.22, 7,915.20 and 1,989.60 is: 2,984.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,276.22 : 7,915.20 = 1,989.60 : x
  2. Step 2: Convert to fraction form
    5,276.22/7,915.20 = 1,989.60/x
  3. Step 3: Cross multiply
    5,276.22x = 7,915.20 × 1,989.60
  4. Step 4: Simplify right side
    5,276.22x = 15,748,081.92
  5. Step 5: Solve for x
    x = 15,748,081.92/5,276.22
  6. Step 6: Final answer
    x = 2,984.73

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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.