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Finding the Fourth Proportional to 15,805.93, 21,810.21 and 9,839.52

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Solution

The fourth proportional to 15,805.93, 21,810.21 and 9,839.52 is: 13,577.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,805.93 : 21,810.21 = 9,839.52 : x
  2. Step 2: Convert to fraction form
    15,805.93/21,810.21 = 9,839.52/x
  3. Step 3: Cross multiply
    15,805.93x = 21,810.21 × 9,839.52
  4. Step 4: Simplify right side
    15,805.93x = 214,601,997.50
  5. Step 5: Solve for x
    x = 214,601,997.50/15,805.93
  6. Step 6: Final answer
    x = 13,577.31

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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.