Home / 15,321.45-21,142.29-8,606.55

Finding the Fourth Proportional to 15,321.45, 21,142.29 and 8,606.55

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Solution

The fourth proportional to 15,321.45, 21,142.29 and 8,606.55 is: 11,876.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.45 : 21,142.29 = 8,606.55 : x
  2. Step 2: Convert to fraction form
    15,321.45/21,142.29 = 8,606.55/x
  3. Step 3: Cross multiply
    15,321.45x = 21,142.29 × 8,606.55
  4. Step 4: Simplify right side
    15,321.45x = 181,962,176.00
  5. Step 5: Solve for x
    x = 181,962,176.00/15,321.45
  6. Step 6: Final answer
    x = 11,876.30

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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.