Home / 21,005.73-28,987.81-11,446.18

Finding the Fourth Proportional to 21,005.73, 28,987.81 and 11,446.18

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Solution

The fourth proportional to 21,005.73, 28,987.81 and 11,446.18 is: 15,795.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.73 : 28,987.81 = 11,446.18 : x
  2. Step 2: Convert to fraction form
    21,005.73/28,987.81 = 11,446.18/x
  3. Step 3: Cross multiply
    21,005.73x = 28,987.81 × 11,446.18
  4. Step 4: Simplify right side
    21,005.73x = 331,799,589.98
  5. Step 5: Solve for x
    x = 331,799,589.98/21,005.73
  6. Step 6: Final answer
    x = 15,795.67

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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.