Home / 21,409.09-29,534.69-13,857.85

Finding the Fourth Proportional to 21,409.09, 29,534.69 and 13,857.85

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Solution

The fourth proportional to 21,409.09, 29,534.69 and 13,857.85 is: 19,117.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409.09 : 29,534.69 = 13,857.85 : x
  2. Step 2: Convert to fraction form
    21,409.09/29,534.69 = 13,857.85/x
  3. Step 3: Cross multiply
    21,409.09x = 29,534.69 × 13,857.85
  4. Step 4: Simplify right side
    21,409.09x = 409,287,303.82
  5. Step 5: Solve for x
    x = 409,287,303.82/21,409.09
  6. Step 6: Final answer
    x = 19,117.45

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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.