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Finding the Fourth Proportional to 13,803,739.20, 20,705,608.80 and 12,124,123.20

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Solution

The fourth proportional to 13,803,739.20, 20,705,608.80 and 12,124,123.20 is: 18,186,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,803,739.20 : 20,705,608.80 = 12,124,123.20 : x
  2. Step 2: Convert to fraction form
    13,803,739.20/20,705,608.80 = 12,124,123.20/x
  3. Step 3: Cross multiply
    13,803,739.20x = 20,705,608.80 × 12,124,123.20
  4. Step 4: Simplify right side
    13,803,739.20x = 251,037,352,022,204.16
  5. Step 5: Solve for x
    x = 251,037,352,022,204.16/13,803,739.20
  6. Step 6: Final answer
    x = 18,186,184.80

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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.