Home / 21,409.03-29,558.91-13,345.87

Finding the Fourth Proportional to 21,409.03, 29,558.91 and 13,345.87

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Solution

The fourth proportional to 21,409.03, 29,558.91 and 13,345.87 is: 18,426.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409.03 : 29,558.91 = 13,345.87 : x
  2. Step 2: Convert to fraction form
    21,409.03/29,558.91 = 13,345.87/x
  3. Step 3: Cross multiply
    21,409.03x = 29,558.91 × 13,345.87
  4. Step 4: Simplify right side
    21,409.03x = 394,489,370.20
  5. Step 5: Solve for x
    x = 394,489,370.20/21,409.03
  6. Step 6: Final answer
    x = 18,426.31

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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.