Home / 21,456.24-29,610.63-13,394.67

Finding the Fourth Proportional to 21,456.24, 29,610.63 and 13,394.67

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Solution

The fourth proportional to 21,456.24, 29,610.63 and 13,394.67 is: 18,485.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.24 : 29,610.63 = 13,394.67 : x
  2. Step 2: Convert to fraction form
    21,456.24/29,610.63 = 13,394.67/x
  3. Step 3: Cross multiply
    21,456.24x = 29,610.63 × 13,394.67
  4. Step 4: Simplify right side
    21,456.24x = 396,624,550.37
  5. Step 5: Solve for x
    x = 396,624,550.37/21,456.24
  6. Step 6: Final answer
    x = 18,485.28

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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.