Home / 20,808.88-28,728.96-13,547.86

Finding the Fourth Proportional to 20,808.88, 28,728.96 and 13,547.86

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Solution

The fourth proportional to 20,808.88, 28,728.96 and 13,547.86 is: 18,704.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.88 : 28,728.96 = 13,547.86 : x
  2. Step 2: Convert to fraction form
    20,808.88/28,728.96 = 13,547.86/x
  3. Step 3: Cross multiply
    20,808.88x = 28,728.96 × 13,547.86
  4. Step 4: Simplify right side
    20,808.88x = 389,215,928.03
  5. Step 5: Solve for x
    x = 389,215,928.03/20,808.88
  6. Step 6: Final answer
    x = 18,704.32

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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.