Home / 15,428.06-21,290.74-8,354.49

Finding the Fourth Proportional to 15,428.06, 21,290.74 and 8,354.49

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Solution

The fourth proportional to 15,428.06, 21,290.74 and 8,354.49 is: 11,529.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.06 : 21,290.74 = 8,354.49 : x
  2. Step 2: Convert to fraction form
    15,428.06/21,290.74 = 8,354.49/x
  3. Step 3: Cross multiply
    15,428.06x = 21,290.74 × 8,354.49
  4. Step 4: Simplify right side
    15,428.06x = 177,873,274.42
  5. Step 5: Solve for x
    x = 177,873,274.42/15,428.06
  6. Step 6: Final answer
    x = 11,529.21

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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.