Home / 15,811.40-21,820.50-8,738.60

Finding the Fourth Proportional to 15,811.40, 21,820.50 and 8,738.60

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Solution

The fourth proportional to 15,811.40, 21,820.50 and 8,738.60 is: 12,059.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.40 : 21,820.50 = 8,738.60 : x
  2. Step 2: Convert to fraction form
    15,811.40/21,820.50 = 8,738.60/x
  3. Step 3: Cross multiply
    15,811.40x = 21,820.50 × 8,738.60
  4. Step 4: Simplify right side
    15,811.40x = 190,680,621.30
  5. Step 5: Solve for x
    x = 190,680,621.30/15,811.40
  6. Step 6: Final answer
    x = 12,059.69

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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.