Home / 15,428.88-21,291.87-8,355.29

Finding the Fourth Proportional to 15,428.88, 21,291.87 and 8,355.29

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Solution

The fourth proportional to 15,428.88, 21,291.87 and 8,355.29 is: 11,530.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.88 : 21,291.87 = 8,355.29 : x
  2. Step 2: Convert to fraction form
    15,428.88/21,291.87 = 8,355.29/x
  3. Step 3: Cross multiply
    15,428.88x = 21,291.87 × 8,355.29
  4. Step 4: Simplify right side
    15,428.88x = 177,899,748.49
  5. Step 5: Solve for x
    x = 177,899,748.49/15,428.88
  6. Step 6: Final answer
    x = 11,530.31

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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.