Home / 15,176.20-20,946.51-9,861.79

Finding the Fourth Proportional to 15,176.20, 20,946.51 and 9,861.79

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Solution

The fourth proportional to 15,176.20, 20,946.51 and 9,861.79 is: 13,611.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,176.20 : 20,946.51 = 9,861.79 : x
  2. Step 2: Convert to fraction form
    15,176.20/20,946.51 = 9,861.79/x
  3. Step 3: Cross multiply
    15,176.20x = 20,946.51 × 9,861.79
  4. Step 4: Simplify right side
    15,176.20x = 206,570,082.85
  5. Step 5: Solve for x
    x = 206,570,082.85/15,176.20
  6. Step 6: Final answer
    x = 13,611.45

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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.