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Finding the Fourth Proportional to 20,302.56, 30,462.93 and 12,905.10

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Solution

The fourth proportional to 20,302.56, 30,462.93 and 12,905.10 is: 19,363.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,302.56 : 30,462.93 = 12,905.10 : x
  2. Step 2: Convert to fraction form
    20,302.56/30,462.93 = 12,905.10/x
  3. Step 3: Cross multiply
    20,302.56x = 30,462.93 × 12,905.10
  4. Step 4: Simplify right side
    20,302.56x = 393,127,157.94
  5. Step 5: Solve for x
    x = 393,127,157.94/20,302.56
  6. Step 6: Final answer
    x = 19,363.43

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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.