Home / 15,428.00-21,290.75-8,354.43

Finding the Fourth Proportional to 15,428.00, 21,290.75 and 8,354.43

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Solution

The fourth proportional to 15,428.00, 21,290.75 and 8,354.43 is: 11,529.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.00 : 21,290.75 = 8,354.43 : x
  2. Step 2: Convert to fraction form
    15,428.00/21,290.75 = 8,354.43/x
  3. Step 3: Cross multiply
    15,428.00x = 21,290.75 × 8,354.43
  4. Step 4: Simplify right side
    15,428.00x = 177,872,038.75
  5. Step 5: Solve for x
    x = 177,872,038.75/15,428.00
  6. Step 6: Final answer
    x = 11,529.17

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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.