Home / 13,997.12-19,315.60-7,709.36

Finding the Fourth Proportional to 13,997.12, 19,315.60 and 7,709.36

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Solution

The fourth proportional to 13,997.12, 19,315.60 and 7,709.36 is: 10,638.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,997.12 : 19,315.60 = 7,709.36 : x
  2. Step 2: Convert to fraction form
    13,997.12/19,315.60 = 7,709.36/x
  3. Step 3: Cross multiply
    13,997.12x = 19,315.60 × 7,709.36
  4. Step 4: Simplify right side
    13,997.12x = 148,910,914.02
  5. Step 5: Solve for x
    x = 148,910,914.02/13,997.12
  6. Step 6: Final answer
    x = 10,638.68

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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.