Home / 12,666.12-18,984.60-7,989.60

Finding the Fourth Proportional to 12,666.12, 18,984.60 and 7,989.60

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Solution

The fourth proportional to 12,666.12, 18,984.60 and 7,989.60 is: 11,975.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.12 : 18,984.60 = 7,989.60 : x
  2. Step 2: Convert to fraction form
    12,666.12/18,984.60 = 7,989.60/x
  3. Step 3: Cross multiply
    12,666.12x = 18,984.60 × 7,989.60
  4. Step 4: Simplify right side
    12,666.12x = 151,679,360.16
  5. Step 5: Solve for x
    x = 151,679,360.16/12,666.12
  6. Step 6: Final answer
    x = 11,975.20

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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.