Home / 13,837.74-20,777.28-7,921.28

Finding the Fourth Proportional to 13,837.74, 20,777.28 and 7,921.28

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Solution

The fourth proportional to 13,837.74, 20,777.28 and 7,921.28 is: 11,893.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,837.74 : 20,777.28 = 7,921.28 : x
  2. Step 2: Convert to fraction form
    13,837.74/20,777.28 = 7,921.28/x
  3. Step 3: Cross multiply
    13,837.74x = 20,777.28 × 7,921.28
  4. Step 4: Simplify right side
    13,837.74x = 164,582,652.52
  5. Step 5: Solve for x
    x = 164,582,652.52/13,837.74
  6. Step 6: Final answer
    x = 11,893.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.