Home / 18,987.41-28,486.89-13,451.47

Finding the Fourth Proportional to 18,987.41, 28,486.89 and 13,451.47

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Solution

The fourth proportional to 18,987.41, 28,486.89 and 13,451.47 is: 20,181.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,987.41 : 28,486.89 = 13,451.47 : x
  2. Step 2: Convert to fraction form
    18,987.41/28,486.89 = 13,451.47/x
  3. Step 3: Cross multiply
    18,987.41x = 28,486.89 × 13,451.47
  4. Step 4: Simplify right side
    18,987.41x = 383,190,475.01
  5. Step 5: Solve for x
    x = 383,190,475.01/18,987.41
  6. Step 6: Final answer
    x = 20,181.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.