Home / 21,555.21-29,748.78-13,057.09

Finding the Fourth Proportional to 21,555.21, 29,748.78 and 13,057.09

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Solution

The fourth proportional to 21,555.21, 29,748.78 and 13,057.09 is: 18,020.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.21 : 29,748.78 = 13,057.09 : x
  2. Step 2: Convert to fraction form
    21,555.21/29,748.78 = 13,057.09/x
  3. Step 3: Cross multiply
    21,555.21x = 29,748.78 × 13,057.09
  4. Step 4: Simplify right side
    21,555.21x = 388,432,349.11
  5. Step 5: Solve for x
    x = 388,432,349.11/21,555.21
  6. Step 6: Final answer
    x = 18,020.35

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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.