Home / 15,428.90-21,291.96-8,355.35

Finding the Fourth Proportional to 15,428.90, 21,291.96 and 8,355.35

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Solution

The fourth proportional to 15,428.90, 21,291.96 and 8,355.35 is: 11,530.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.90 : 21,291.96 = 8,355.35 : x
  2. Step 2: Convert to fraction form
    15,428.90/21,291.96 = 8,355.35/x
  3. Step 3: Cross multiply
    15,428.90x = 21,291.96 × 8,355.35
  4. Step 4: Simplify right side
    15,428.90x = 177,901,777.99
  5. Step 5: Solve for x
    x = 177,901,777.99/15,428.90
  6. Step 6: Final answer
    x = 11,530.43

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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.