Home / 13,784.32-20,679.34-7,208.72

Finding the Fourth Proportional to 13,784.32, 20,679.34 and 7,208.72

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Solution

The fourth proportional to 13,784.32, 20,679.34 and 7,208.72 is: 10,814.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,784.32 : 20,679.34 = 7,208.72 : x
  2. Step 2: Convert to fraction form
    13,784.32/20,679.34 = 7,208.72/x
  3. Step 3: Cross multiply
    13,784.32x = 20,679.34 × 7,208.72
  4. Step 4: Simplify right side
    13,784.32x = 149,071,571.84
  5. Step 5: Solve for x
    x = 149,071,571.84/13,784.32
  6. Step 6: Final answer
    x = 10,814.58

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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.