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Finding the Fourth Proportional to 12,666.79, 18,999.72 and 3,901.48

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Solution

The fourth proportional to 12,666.79, 18,999.72 and 3,901.48 is: 5,852.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.79 : 18,999.72 = 3,901.48 : x
  2. Step 2: Convert to fraction form
    12,666.79/18,999.72 = 3,901.48/x
  3. Step 3: Cross multiply
    12,666.79x = 18,999.72 × 3,901.48
  4. Step 4: Simplify right side
    12,666.79x = 74,126,932.59
  5. Step 5: Solve for x
    x = 74,126,932.59/12,666.79
  6. Step 6: Final answer
    x = 5,852.07

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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.