Home / 15,180.72-20,940.36-11,818.20

Finding the Fourth Proportional to 15,180.72, 20,940.36 and 11,818.20

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Solution

The fourth proportional to 15,180.72, 20,940.36 and 11,818.20 is: 16,302.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,180.72 : 20,940.36 = 11,818.20 : x
  2. Step 2: Convert to fraction form
    15,180.72/20,940.36 = 11,818.20/x
  3. Step 3: Cross multiply
    15,180.72x = 20,940.36 × 11,818.20
  4. Step 4: Simplify right side
    15,180.72x = 247,477,362.55
  5. Step 5: Solve for x
    x = 247,477,362.55/15,180.72
  6. Step 6: Final answer
    x = 16,302.08

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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.