Home / 21,204.08-31,805.31-8,720.63

Finding the Fourth Proportional to 21,204.08, 31,805.31 and 8,720.63

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Solution

The fourth proportional to 21,204.08, 31,805.31 and 8,720.63 is: 13,080.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,204.08 : 31,805.31 = 8,720.63 : x
  2. Step 2: Convert to fraction form
    21,204.08/31,805.31 = 8,720.63/x
  3. Step 3: Cross multiply
    21,204.08x = 31,805.31 × 8,720.63
  4. Step 4: Simplify right side
    21,204.08x = 277,362,340.55
  5. Step 5: Solve for x
    x = 277,362,340.55/21,204.08
  6. Step 6: Final answer
    x = 13,080.61

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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.