Home / 30,961.03-42,739.31-20,903.10

Finding the Fourth Proportional to 30,961.03, 42,739.31 and 20,903.10

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Solution

The fourth proportional to 30,961.03, 42,739.31 and 20,903.10 is: 28,855.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,961.03 : 42,739.31 = 20,903.10 : x
  2. Step 2: Convert to fraction form
    30,961.03/42,739.31 = 20,903.10/x
  3. Step 3: Cross multiply
    30,961.03x = 42,739.31 × 20,903.10
  4. Step 4: Simplify right side
    30,961.03x = 893,384,070.86
  5. Step 5: Solve for x
    x = 893,384,070.86/30,961.03
  6. Step 6: Final answer
    x = 28,855.11

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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.