Home / 54,459.30-81,628.20-21,168.30

Finding the Fourth Proportional to 54,459.30, 81,628.20 and 21,168.30

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Solution

The fourth proportional to 54,459.30, 81,628.20 and 21,168.30 is: 31,728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,459.30 : 81,628.20 = 21,168.30 : x
  2. Step 2: Convert to fraction form
    54,459.30/81,628.20 = 21,168.30/x
  3. Step 3: Cross multiply
    54,459.30x = 81,628.20 × 21,168.30
  4. Step 4: Simplify right side
    54,459.30x = 1,727,930,226.06
  5. Step 5: Solve for x
    x = 1,727,930,226.06/54,459.30
  6. Step 6: Final answer
    x = 31,728.84

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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.