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Finding the Fourth Proportional to 12,655.42, 18,983.20 and 8,300.46

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Solution

The fourth proportional to 12,655.42, 18,983.20 and 8,300.46 is: 12,450.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,655.42 : 18,983.20 = 8,300.46 : x
  2. Step 2: Convert to fraction form
    12,655.42/18,983.20 = 8,300.46/x
  3. Step 3: Cross multiply
    12,655.42x = 18,983.20 × 8,300.46
  4. Step 4: Simplify right side
    12,655.42x = 157,569,292.27
  5. Step 5: Solve for x
    x = 157,569,292.27/12,655.42
  6. Step 6: Final answer
    x = 12,450.74

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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.