Home / 20,946.16-28,905.80-11,515.34

Finding the Fourth Proportional to 20,946.16, 28,905.80 and 11,515.34

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Solution

The fourth proportional to 20,946.16, 28,905.80 and 11,515.34 is: 15,891.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.16 : 28,905.80 = 11,515.34 : x
  2. Step 2: Convert to fraction form
    20,946.16/28,905.80 = 11,515.34/x
  3. Step 3: Cross multiply
    20,946.16x = 28,905.80 × 11,515.34
  4. Step 4: Simplify right side
    20,946.16x = 332,860,114.97
  5. Step 5: Solve for x
    x = 332,860,114.97/20,946.16
  6. Step 6: Final answer
    x = 15,891.22

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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.