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Finding the Fourth Proportional to 20,419.69, 28,091.69 and 19,544.89

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Solution

The fourth proportional to 20,419.69, 28,091.69 and 19,544.89 is: 26,888.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.69 : 28,091.69 = 19,544.89 : x
  2. Step 2: Convert to fraction form
    20,419.69/28,091.69 = 19,544.89/x
  3. Step 3: Cross multiply
    20,419.69x = 28,091.69 × 19,544.89
  4. Step 4: Simplify right side
    20,419.69x = 549,048,893.24
  5. Step 5: Solve for x
    x = 549,048,893.24/20,419.69
  6. Step 6: Final answer
    x = 26,888.21

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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.