Home / 30,961.29-42,739.65-20,903.34

Finding the Fourth Proportional to 30,961.29, 42,739.65 and 20,903.34

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Solution

The fourth proportional to 30,961.29, 42,739.65 and 20,903.34 is: 28,855.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,961.29 : 42,739.65 = 20,903.34 : x
  2. Step 2: Convert to fraction form
    30,961.29/42,739.65 = 20,903.34/x
  3. Step 3: Cross multiply
    30,961.29x = 42,739.65 × 20,903.34
  4. Step 4: Simplify right side
    30,961.29x = 893,401,435.43
  5. Step 5: Solve for x
    x = 893,401,435.43/30,961.29
  6. Step 6: Final answer
    x = 28,855.43

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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.