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Finding the Fourth Proportional to 28,851, 39,814.38 and 20,482.08

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Solution

The fourth proportional to 28,851, 39,814.38 and 20,482.08 is: 28,265.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,851 : 39,814.38 = 20,482.08 : x
  2. Step 2: Convert to fraction form
    28,851/39,814.38 = 20,482.08/x
  3. Step 3: Cross multiply
    28,851x = 39,814.38 × 20,482.08
  4. Step 4: Simplify right side
    28,851x = 815,481,316.31
  5. Step 5: Solve for x
    x = 815,481,316.31/28,851
  6. Step 6: Final answer
    x = 28,265.27

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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.