Home / 21,118.20-31,684.34-7,079.63

Finding the Fourth Proportional to 21,118.20, 31,684.34 and 7,079.63

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Solution

The fourth proportional to 21,118.20, 31,684.34 and 7,079.63 is: 10,621.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.20 : 31,684.34 = 7,079.63 : x
  2. Step 2: Convert to fraction form
    21,118.20/31,684.34 = 7,079.63/x
  3. Step 3: Cross multiply
    21,118.20x = 31,684.34 × 7,079.63
  4. Step 4: Simplify right side
    21,118.20x = 224,313,263.27
  5. Step 5: Solve for x
    x = 224,313,263.27/21,118.20
  6. Step 6: Final answer
    x = 10,621.80

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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.