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Finding the Fourth Proportional to 15,804.60, 21,810.66 and 8,731.32

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Solution

The fourth proportional to 15,804.60, 21,810.66 and 8,731.32 is: 12,049.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,804.60 : 21,810.66 = 8,731.32 : x
  2. Step 2: Convert to fraction form
    15,804.60/21,810.66 = 8,731.32/x
  3. Step 3: Cross multiply
    15,804.60x = 21,810.66 × 8,731.32
  4. Step 4: Simplify right side
    15,804.60x = 190,435,851.87
  5. Step 5: Solve for x
    x = 190,435,851.87/15,804.60
  6. Step 6: Final answer
    x = 12,049.39

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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.