Home / 12,660.90-18,998.10-4,768.80

Finding the Fourth Proportional to 12,660.90, 18,998.10 and 4,768.80

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Solution

The fourth proportional to 12,660.90, 18,998.10 and 4,768.80 is: 7,155.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.90 : 18,998.10 = 4,768.80 : x
  2. Step 2: Convert to fraction form
    12,660.90/18,998.10 = 4,768.80/x
  3. Step 3: Cross multiply
    12,660.90x = 18,998.10 × 4,768.80
  4. Step 4: Simplify right side
    12,660.90x = 90,598,139.28
  5. Step 5: Solve for x
    x = 90,598,139.28/12,660.90
  6. Step 6: Final answer
    x = 7,155.74

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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.