Home / 14,772.31-20,379.26-9,990.54

Finding the Fourth Proportional to 14,772.31, 20,379.26 and 9,990.54

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Solution

The fourth proportional to 14,772.31, 20,379.26 and 9,990.54 is: 13,782.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,772.31 : 20,379.26 = 9,990.54 : x
  2. Step 2: Convert to fraction form
    14,772.31/20,379.26 = 9,990.54/x
  3. Step 3: Cross multiply
    14,772.31x = 20,379.26 × 9,990.54
  4. Step 4: Simplify right side
    14,772.31x = 203,599,837.18
  5. Step 5: Solve for x
    x = 203,599,837.18/14,772.31
  6. Step 6: Final answer
    x = 13,782.53

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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.