Home / 21,563.30-29,757.75-13,065.14

Finding the Fourth Proportional to 21,563.30, 29,757.75 and 13,065.14

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Solution

The fourth proportional to 21,563.30, 29,757.75 and 13,065.14 is: 18,030.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,563.30 : 29,757.75 = 13,065.14 : x
  2. Step 2: Convert to fraction form
    21,563.30/29,757.75 = 13,065.14/x
  3. Step 3: Cross multiply
    21,563.30x = 29,757.75 × 13,065.14
  4. Step 4: Simplify right side
    21,563.30x = 388,789,169.84
  5. Step 5: Solve for x
    x = 388,789,169.84/21,563.30
  6. Step 6: Final answer
    x = 18,030.13

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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.