Home / 15,813.57-21,821.63-8,739.44

Finding the Fourth Proportional to 15,813.57, 21,821.63 and 8,739.44

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Solution

The fourth proportional to 15,813.57, 21,821.63 and 8,739.44 is: 12,059.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,813.57 : 21,821.63 = 8,739.44 : x
  2. Step 2: Convert to fraction form
    15,813.57/21,821.63 = 8,739.44/x
  3. Step 3: Cross multiply
    15,813.57x = 21,821.63 × 8,739.44
  4. Step 4: Simplify right side
    15,813.57x = 190,708,826.09
  5. Step 5: Solve for x
    x = 190,708,826.09/15,813.57
  6. Step 6: Final answer
    x = 12,059.82

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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.