Home / 12,144.80-18,220.23-9,655.40

Finding the Fourth Proportional to 12,144.80, 18,220.23 and 9,655.40

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Solution

The fourth proportional to 12,144.80, 18,220.23 and 9,655.40 is: 14,485.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,144.80 : 18,220.23 = 9,655.40 : x
  2. Step 2: Convert to fraction form
    12,144.80/18,220.23 = 9,655.40/x
  3. Step 3: Cross multiply
    12,144.80x = 18,220.23 × 9,655.40
  4. Step 4: Simplify right side
    12,144.80x = 175,923,608.74
  5. Step 5: Solve for x
    x = 175,923,608.74/12,144.80
  6. Step 6: Final answer
    x = 14,485.51

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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.