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Finding the Fourth Proportional to 12,101.80, 18,152.70 and 11,008.30

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Solution

The fourth proportional to 12,101.80, 18,152.70 and 11,008.30 is: 16,512.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,101.80 : 18,152.70 = 11,008.30 : x
  2. Step 2: Convert to fraction form
    12,101.80/18,152.70 = 11,008.30/x
  3. Step 3: Cross multiply
    12,101.80x = 18,152.70 × 11,008.30
  4. Step 4: Simplify right side
    12,101.80x = 199,830,367.41
  5. Step 5: Solve for x
    x = 199,830,367.41/12,101.80
  6. Step 6: Final answer
    x = 16,512.45

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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.