Home / 21,005.61-28,987.66-11,446.03

Finding the Fourth Proportional to 21,005.61, 28,987.66 and 11,446.03

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Solution

The fourth proportional to 21,005.61, 28,987.66 and 11,446.03 is: 15,795.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.61 : 28,987.66 = 11,446.03 : x
  2. Step 2: Convert to fraction form
    21,005.61/28,987.66 = 11,446.03/x
  3. Step 3: Cross multiply
    21,005.61x = 28,987.66 × 11,446.03
  4. Step 4: Simplify right side
    21,005.61x = 331,793,625.99
  5. Step 5: Solve for x
    x = 331,793,625.99/21,005.61
  6. Step 6: Final answer
    x = 15,795.48

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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.