Home / 12,505.32-17,220.60-11,178.54

Finding the Fourth Proportional to 12,505.32, 17,220.60 and 11,178.54

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Solution

The fourth proportional to 12,505.32, 17,220.60 and 11,178.54 is: 15,393.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.32 : 17,220.60 = 11,178.54 : x
  2. Step 2: Convert to fraction form
    12,505.32/17,220.60 = 11,178.54/x
  3. Step 3: Cross multiply
    12,505.32x = 17,220.60 × 11,178.54
  4. Step 4: Simplify right side
    12,505.32x = 192,501,165.92
  5. Step 5: Solve for x
    x = 192,501,165.92/12,505.32
  6. Step 6: Final answer
    x = 15,393.54

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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.