Home / 20,615.49-28,450.07-12,117.48

Finding the Fourth Proportional to 20,615.49, 28,450.07 and 12,117.48

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Solution

The fourth proportional to 20,615.49, 28,450.07 and 12,117.48 is: 16,722.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.49 : 28,450.07 = 12,117.48 : x
  2. Step 2: Convert to fraction form
    20,615.49/28,450.07 = 12,117.48/x
  3. Step 3: Cross multiply
    20,615.49x = 28,450.07 × 12,117.48
  4. Step 4: Simplify right side
    20,615.49x = 344,743,154.22
  5. Step 5: Solve for x
    x = 344,743,154.22/20,615.49
  6. Step 6: Final answer
    x = 16,722.53

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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.