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Finding the Fourth Proportional to 15,813.09, 21,822.48 and 8,739.63

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Solution

The fourth proportional to 15,813.09, 21,822.48 and 8,739.63 is: 12,060.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,813.09 : 21,822.48 = 8,739.63 : x
  2. Step 2: Convert to fraction form
    15,813.09/21,822.48 = 8,739.63/x
  3. Step 3: Cross multiply
    15,813.09x = 21,822.48 × 8,739.63
  4. Step 4: Simplify right side
    15,813.09x = 190,720,400.88
  5. Step 5: Solve for x
    x = 190,720,400.88/15,813.09
  6. Step 6: Final answer
    x = 12,060.92

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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.