Home / 20,637.32-28,481.26-11,686.40

Finding the Fourth Proportional to 20,637.32, 28,481.26 and 11,686.40

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Solution

The fourth proportional to 20,637.32, 28,481.26 and 11,686.40 is: 16,128.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.32 : 28,481.26 = 11,686.40 : x
  2. Step 2: Convert to fraction form
    20,637.32/28,481.26 = 11,686.40/x
  3. Step 3: Cross multiply
    20,637.32x = 28,481.26 × 11,686.40
  4. Step 4: Simplify right side
    20,637.32x = 332,843,396.86
  5. Step 5: Solve for x
    x = 332,843,396.86/20,637.32
  6. Step 6: Final answer
    x = 16,128.23

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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.