Home / 11,220.78-15,485.52-6,505.02

Finding the Fourth Proportional to 11,220.78, 15,485.52 and 6,505.02

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Solution

The fourth proportional to 11,220.78, 15,485.52 and 6,505.02 is: 8,977.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,220.78 : 15,485.52 = 6,505.02 : x
  2. Step 2: Convert to fraction form
    11,220.78/15,485.52 = 6,505.02/x
  3. Step 3: Cross multiply
    11,220.78x = 15,485.52 × 6,505.02
  4. Step 4: Simplify right side
    11,220.78x = 100,733,617.31
  5. Step 5: Solve for x
    x = 100,733,617.31/11,220.78
  6. Step 6: Final answer
    x = 8,977.42

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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.