Home / 20,911.64-28,859.99-11,957.36

Finding the Fourth Proportional to 20,911.64, 28,859.99 and 11,957.36

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Solution

The fourth proportional to 20,911.64, 28,859.99 and 11,957.36 is: 16,502.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.64 : 28,859.99 = 11,957.36 : x
  2. Step 2: Convert to fraction form
    20,911.64/28,859.99 = 11,957.36/x
  3. Step 3: Cross multiply
    20,911.64x = 28,859.99 × 11,957.36
  4. Step 4: Simplify right side
    20,911.64x = 345,089,085.94
  5. Step 5: Solve for x
    x = 345,089,085.94/20,911.64
  6. Step 6: Final answer
    x = 16,502.25

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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.