Home / 20,509,813.60-30,764,720.40-12,857,063.20

Finding the Fourth Proportional to 20,509,813.60, 30,764,720.40 and 12,857,063.20

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Solution

The fourth proportional to 20,509,813.60, 30,764,720.40 and 12,857,063.20 is: 19,285,594.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509,813.60 : 30,764,720.40 = 12,857,063.20 : x
  2. Step 2: Convert to fraction form
    20,509,813.60/30,764,720.40 = 12,857,063.20/x
  3. Step 3: Cross multiply
    20,509,813.60x = 30,764,720.40 × 12,857,063.20
  4. Step 4: Simplify right side
    20,509,813.60x = 395,543,954,513,129.25
  5. Step 5: Solve for x
    x = 395,543,954,513,129.25/20,509,813.60
  6. Step 6: Final answer
    x = 19,285,594.80

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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.