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Finding the Fourth Proportional to 12,296,709.80, 18,445,064.70 and 12,128,748.20

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Solution

The fourth proportional to 12,296,709.80, 18,445,064.70 and 12,128,748.20 is: 18,193,122.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,296,709.80 : 18,445,064.70 = 12,128,748.20 : x
  2. Step 2: Convert to fraction form
    12,296,709.80/18,445,064.70 = 12,128,748.20/x
  3. Step 3: Cross multiply
    12,296,709.80x = 18,445,064.70 × 12,128,748.20
  4. Step 4: Simplify right side
    12,296,709.80x = 223,715,545,279,008.53
  5. Step 5: Solve for x
    x = 223,715,545,279,008.53/12,296,709.80
  6. Step 6: Final answer
    x = 18,193,122.30

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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.