Home / 20,509,689.60-30,764,534.40-12,856,939.20

Finding the Fourth Proportional to 20,509,689.60, 30,764,534.40 and 12,856,939.20

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Solution

The fourth proportional to 20,509,689.60, 30,764,534.40 and 12,856,939.20 is: 19,285,408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509,689.60 : 30,764,534.40 = 12,856,939.20 : x
  2. Step 2: Convert to fraction form
    20,509,689.60/30,764,534.40 = 12,856,939.20/x
  3. Step 3: Cross multiply
    20,509,689.60x = 30,764,534.40 × 12,856,939.20
  4. Step 4: Simplify right side
    20,509,689.60x = 395,537,748,297,108.44
  5. Step 5: Solve for x
    x = 395,537,748,297,108.44/20,509,689.60
  6. Step 6: Final answer
    x = 19,285,408.80

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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.