Home / 12,647.40-18,938.70-9,342.60

Finding the Fourth Proportional to 12,647.40, 18,938.70 and 9,342.60

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Solution

The fourth proportional to 12,647.40, 18,938.70 and 9,342.60 is: 13,989.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.40 : 18,938.70 = 9,342.60 : x
  2. Step 2: Convert to fraction form
    12,647.40/18,938.70 = 9,342.60/x
  3. Step 3: Cross multiply
    12,647.40x = 18,938.70 × 9,342.60
  4. Step 4: Simplify right side
    12,647.40x = 176,936,698.62
  5. Step 5: Solve for x
    x = 176,936,698.62/12,647.40
  6. Step 6: Final answer
    x = 13,989.97

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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.