Home / 21,327.36-31,991.20-13,935.36

Finding the Fourth Proportional to 21,327.36, 31,991.20 and 13,935.36

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Solution

The fourth proportional to 21,327.36, 31,991.20 and 13,935.36 is: 20,903.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.36 : 31,991.20 = 13,935.36 : x
  2. Step 2: Convert to fraction form
    21,327.36/31,991.20 = 13,935.36/x
  3. Step 3: Cross multiply
    21,327.36x = 31,991.20 × 13,935.36
  4. Step 4: Simplify right side
    21,327.36x = 445,808,888.83
  5. Step 5: Solve for x
    x = 445,808,888.83/21,327.36
  6. Step 6: Final answer
    x = 20,903.14

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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.