Home / 21,028.31-31,526.82-9,928.68

Finding the Fourth Proportional to 21,028.31, 31,526.82 and 9,928.68

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Solution

The fourth proportional to 21,028.31, 31,526.82 and 9,928.68 is: 14,885.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,028.31 : 31,526.82 = 9,928.68 : x
  2. Step 2: Convert to fraction form
    21,028.31/31,526.82 = 9,928.68/x
  3. Step 3: Cross multiply
    21,028.31x = 31,526.82 × 9,928.68
  4. Step 4: Simplify right side
    21,028.31x = 313,019,588.97
  5. Step 5: Solve for x
    x = 313,019,588.97/21,028.31
  6. Step 6: Final answer
    x = 14,885.63

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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.