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Finding the Fourth Proportional to 12,804.95, 17,664.55 and 8,557.06

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Solution

The fourth proportional to 12,804.95, 17,664.55 and 8,557.06 is: 11,804.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,804.95 : 17,664.55 = 8,557.06 : x
  2. Step 2: Convert to fraction form
    12,804.95/17,664.55 = 8,557.06/x
  3. Step 3: Cross multiply
    12,804.95x = 17,664.55 × 8,557.06
  4. Step 4: Simplify right side
    12,804.95x = 151,156,525.90
  5. Step 5: Solve for x
    x = 151,156,525.90/12,804.95
  6. Step 6: Final answer
    x = 11,804.54

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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.