Home / 13,771.32-18,999.90-7,800.84

Finding the Fourth Proportional to 13,771.32, 18,999.90 and 7,800.84

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Solution

The fourth proportional to 13,771.32, 18,999.90 and 7,800.84 is: 10,762.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,771.32 : 18,999.90 = 7,800.84 : x
  2. Step 2: Convert to fraction form
    13,771.32/18,999.90 = 7,800.84/x
  3. Step 3: Cross multiply
    13,771.32x = 18,999.90 × 7,800.84
  4. Step 4: Simplify right side
    13,771.32x = 148,215,179.92
  5. Step 5: Solve for x
    x = 148,215,179.92/13,771.32
  6. Step 6: Final answer
    x = 10,762.60

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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.