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Finding the Fourth Proportional to 12,652,999.40, 18,979,499.10 and 12,156,987.80

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Solution

The fourth proportional to 12,652,999.40, 18,979,499.10 and 12,156,987.80 is: 18,235,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,652,999.40 : 18,979,499.10 = 12,156,987.80 : x
  2. Step 2: Convert to fraction form
    12,652,999.40/18,979,499.10 = 12,156,987.80/x
  3. Step 3: Cross multiply
    12,652,999.40x = 18,979,499.10 × 12,156,987.80
  4. Step 4: Simplify right side
    12,652,999.40x = 230,733,539,008,811
  5. Step 5: Solve for x
    x = 230,733,539,008,811/12,652,999.40
  6. Step 6: Final answer
    x = 18,235,481.70

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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.