Home / 12,657.75-18,998.21-6,422.07

Finding the Fourth Proportional to 12,657.75, 18,998.21 and 6,422.07

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Solution

The fourth proportional to 12,657.75, 18,998.21 and 6,422.07 is: 9,638.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.75 : 18,998.21 = 6,422.07 : x
  2. Step 2: Convert to fraction form
    12,657.75/18,998.21 = 6,422.07/x
  3. Step 3: Cross multiply
    12,657.75x = 18,998.21 × 6,422.07
  4. Step 4: Simplify right side
    12,657.75x = 122,007,834.49
  5. Step 5: Solve for x
    x = 122,007,834.49/12,657.75
  6. Step 6: Final answer
    x = 9,638.98

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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.