Home / 21,290.98-29,381.18-11,859.34

Finding the Fourth Proportional to 21,290.98, 29,381.18 and 11,859.34

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Solution

The fourth proportional to 21,290.98, 29,381.18 and 11,859.34 is: 16,365.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.98 : 29,381.18 = 11,859.34 : x
  2. Step 2: Convert to fraction form
    21,290.98/29,381.18 = 11,859.34/x
  3. Step 3: Cross multiply
    21,290.98x = 29,381.18 × 11,859.34
  4. Step 4: Simplify right side
    21,290.98x = 348,441,403.22
  5. Step 5: Solve for x
    x = 348,441,403.22/21,290.98
  6. Step 6: Final answer
    x = 16,365.68

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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.