Home / 13,981.56-20,959.86-5,216.88

Finding the Fourth Proportional to 13,981.56, 20,959.86 and 5,216.88

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Solution

The fourth proportional to 13,981.56, 20,959.86 and 5,216.88 is: 7,820.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.56 : 20,959.86 = 5,216.88 : x
  2. Step 2: Convert to fraction form
    13,981.56/20,959.86 = 5,216.88/x
  3. Step 3: Cross multiply
    13,981.56x = 20,959.86 × 5,216.88
  4. Step 4: Simplify right side
    13,981.56x = 109,345,074.44
  5. Step 5: Solve for x
    x = 109,345,074.44/13,981.56
  6. Step 6: Final answer
    x = 7,820.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.