Home / 30,861.15-42,589.85-18,114.89

Finding the Fourth Proportional to 30,861.15, 42,589.85 and 18,114.89

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Solution

The fourth proportional to 30,861.15, 42,589.85 and 18,114.89 is: 24,999.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,861.15 : 42,589.85 = 18,114.89 : x
  2. Step 2: Convert to fraction form
    30,861.15/42,589.85 = 18,114.89/x
  3. Step 3: Cross multiply
    30,861.15x = 42,589.85 × 18,114.89
  4. Step 4: Simplify right side
    30,861.15x = 771,510,485.81
  5. Step 5: Solve for x
    x = 771,510,485.81/30,861.15
  6. Step 6: Final answer
    x = 24,999.41

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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.