Home / 8,783.55-12,121.38-5,645.25

Finding the Fourth Proportional to 8,783.55, 12,121.38 and 5,645.25

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Solution

The fourth proportional to 8,783.55, 12,121.38 and 5,645.25 is: 7,790.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,783.55 : 12,121.38 = 5,645.25 : x
  2. Step 2: Convert to fraction form
    8,783.55/12,121.38 = 5,645.25/x
  3. Step 3: Cross multiply
    8,783.55x = 12,121.38 × 5,645.25
  4. Step 4: Simplify right side
    8,783.55x = 68,428,220.45
  5. Step 5: Solve for x
    x = 68,428,220.45/8,783.55
  6. Step 6: Final answer
    x = 7,790.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.