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Finding the Fourth Proportional to 21,740.70, 30,003.03 and 12,308.70

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Solution

The fourth proportional to 21,740.70, 30,003.03 and 12,308.70 is: 16,986.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,740.70 : 30,003.03 = 12,308.70 : x
  2. Step 2: Convert to fraction form
    21,740.70/30,003.03 = 12,308.70/x
  3. Step 3: Cross multiply
    21,740.70x = 30,003.03 × 12,308.70
  4. Step 4: Simplify right side
    21,740.70x = 369,298,295.36
  5. Step 5: Solve for x
    x = 369,298,295.36/21,740.70
  6. Step 6: Final answer
    x = 16,986.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.