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Finding the Fourth Proportional to 15,804.59, 21,809.25 and 8,731.26

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Solution

The fourth proportional to 15,804.59, 21,809.25 and 8,731.26 is: 12,048.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,804.59 : 21,809.25 = 8,731.26 : x
  2. Step 2: Convert to fraction form
    15,804.59/21,809.25 = 8,731.26/x
  3. Step 3: Cross multiply
    15,804.59x = 21,809.25 × 8,731.26
  4. Step 4: Simplify right side
    15,804.59x = 190,422,232.16
  5. Step 5: Solve for x
    x = 190,422,232.16/15,804.59
  6. Step 6: Final answer
    x = 12,048.54

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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.