Home / 15,812.45-21,821.48-8,738.72

Finding the Fourth Proportional to 15,812.45, 21,821.48 and 8,738.72

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Solution

The fourth proportional to 15,812.45, 21,821.48 and 8,738.72 is: 12,059.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.45 : 21,821.48 = 8,738.72 : x
  2. Step 2: Convert to fraction form
    15,812.45/21,821.48 = 8,738.72/x
  3. Step 3: Cross multiply
    15,812.45x = 21,821.48 × 8,738.72
  4. Step 4: Simplify right side
    15,812.45x = 190,691,650.90
  5. Step 5: Solve for x
    x = 190,691,650.90/15,812.45
  6. Step 6: Final answer
    x = 12,059.59

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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.