Home / 20,845.86-28,767.51-12,886.26

Finding the Fourth Proportional to 20,845.86, 28,767.51 and 12,886.26

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Solution

The fourth proportional to 20,845.86, 28,767.51 and 12,886.26 is: 17,783.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.86 : 28,767.51 = 12,886.26 : x
  2. Step 2: Convert to fraction form
    20,845.86/28,767.51 = 12,886.26/x
  3. Step 3: Cross multiply
    20,845.86x = 28,767.51 × 12,886.26
  4. Step 4: Simplify right side
    20,845.86x = 370,705,613.41
  5. Step 5: Solve for x
    x = 370,705,613.41/20,845.86
  6. Step 6: Final answer
    x = 17,783.18

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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.