Home / 8,180.40-12,270.60-4,681.20

Finding the Fourth Proportional to 8,180.40, 12,270.60 and 4,681.20

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Solution

The fourth proportional to 8,180.40, 12,270.60 and 4,681.20 is: 7,021.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,180.40 : 12,270.60 = 4,681.20 : x
  2. Step 2: Convert to fraction form
    8,180.40/12,270.60 = 4,681.20/x
  3. Step 3: Cross multiply
    8,180.40x = 12,270.60 × 4,681.20
  4. Step 4: Simplify right side
    8,180.40x = 57,441,132.72
  5. Step 5: Solve for x
    x = 57,441,132.72/8,180.40
  6. Step 6: Final answer
    x = 7,021.80

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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.