Home / 30,878.03-42,577.84-20,103.02

Finding the Fourth Proportional to 30,878.03, 42,577.84 and 20,103.02

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Solution

The fourth proportional to 30,878.03, 42,577.84 and 20,103.02 is: 27,720.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,878.03 : 42,577.84 = 20,103.02 : x
  2. Step 2: Convert to fraction form
    30,878.03/42,577.84 = 20,103.02/x
  3. Step 3: Cross multiply
    30,878.03x = 42,577.84 × 20,103.02
  4. Step 4: Simplify right side
    30,878.03x = 855,943,169.08
  5. Step 5: Solve for x
    x = 855,943,169.08/30,878.03
  6. Step 6: Final answer
    x = 27,720.14

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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.