Home / 30,750.24-42,433.20-18,172.56

Finding the Fourth Proportional to 30,750.24, 42,433.20 and 18,172.56

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Solution

The fourth proportional to 30,750.24, 42,433.20 and 18,172.56 is: 25,076.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,750.24 : 42,433.20 = 18,172.56 : x
  2. Step 2: Convert to fraction form
    30,750.24/42,433.20 = 18,172.56/x
  3. Step 3: Cross multiply
    30,750.24x = 42,433.20 × 18,172.56
  4. Step 4: Simplify right side
    30,750.24x = 771,119,872.99
  5. Step 5: Solve for x
    x = 771,119,872.99/30,750.24
  6. Step 6: Final answer
    x = 25,076.87

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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.