Home / 30,156.10-41,615.85-18,217.78

Finding the Fourth Proportional to 30,156.10, 41,615.85 and 18,217.78

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Solution

The fourth proportional to 30,156.10, 41,615.85 and 18,217.78 is: 25,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,156.10 : 41,615.85 = 18,217.78 : x
  2. Step 2: Convert to fraction form
    30,156.10/41,615.85 = 18,217.78/x
  3. Step 3: Cross multiply
    30,156.10x = 41,615.85 × 18,217.78
  4. Step 4: Simplify right side
    30,156.10x = 758,148,399.81
  5. Step 5: Solve for x
    x = 758,148,399.81/30,156.10
  6. Step 6: Final answer
    x = 25,140.80

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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.