Home / 15,428.14-21,290.90-8,354.57

Finding the Fourth Proportional to 15,428.14, 21,290.90 and 8,354.57

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Solution

The fourth proportional to 15,428.14, 21,290.90 and 8,354.57 is: 11,529.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.14 : 21,290.90 = 8,354.57 : x
  2. Step 2: Convert to fraction form
    15,428.14/21,290.90 = 8,354.57/x
  3. Step 3: Cross multiply
    15,428.14x = 21,290.90 × 8,354.57
  4. Step 4: Simplify right side
    15,428.14x = 177,876,166.19
  5. Step 5: Solve for x
    x = 177,876,166.19/15,428.14
  6. Step 6: Final answer
    x = 11,529.34

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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.