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Finding the Fourth Proportional to 12,606.79, 18,921.11 and 12,577.63

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Solution

The fourth proportional to 12,606.79, 18,921.11 and 12,577.63 is: 18,877.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,606.79 : 18,921.11 = 12,577.63 : x
  2. Step 2: Convert to fraction form
    12,606.79/18,921.11 = 12,577.63/x
  3. Step 3: Cross multiply
    12,606.79x = 18,921.11 × 12,577.63
  4. Step 4: Simplify right side
    12,606.79x = 237,982,720.77
  5. Step 5: Solve for x
    x = 237,982,720.77/12,606.79
  6. Step 6: Final answer
    x = 18,877.34

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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.