Home / 20,638.79-28,480.98-11,687.14

Finding the Fourth Proportional to 20,638.79, 28,480.98 and 11,687.14

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Solution

The fourth proportional to 20,638.79, 28,480.98 and 11,687.14 is: 16,127.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.79 : 28,480.98 = 11,687.14 : x
  2. Step 2: Convert to fraction form
    20,638.79/28,480.98 = 11,687.14/x
  3. Step 3: Cross multiply
    20,638.79x = 28,480.98 × 11,687.14
  4. Step 4: Simplify right side
    20,638.79x = 332,861,058.19
  5. Step 5: Solve for x
    x = 332,861,058.19/20,638.79
  6. Step 6: Final answer
    x = 16,127.93

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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.