Home / 12,989.64-19,456.86-12,534.96

Finding the Fourth Proportional to 12,989.64, 19,456.86 and 12,534.96

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Solution

The fourth proportional to 12,989.64, 19,456.86 and 12,534.96 is: 18,775.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.64 : 19,456.86 = 12,534.96 : x
  2. Step 2: Convert to fraction form
    12,989.64/19,456.86 = 12,534.96/x
  3. Step 3: Cross multiply
    12,989.64x = 19,456.86 × 12,534.96
  4. Step 4: Simplify right side
    12,989.64x = 243,890,961.83
  5. Step 5: Solve for x
    x = 243,890,961.83/12,989.64
  6. Step 6: Final answer
    x = 18,775.81

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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.