Home / 20,190,657.20-30,285,985.80-12,128,500.40

Finding the Fourth Proportional to 20,190,657.20, 30,285,985.80 and 12,128,500.40

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Solution

The fourth proportional to 20,190,657.20, 30,285,985.80 and 12,128,500.40 is: 18,192,750.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190,657.20 : 30,285,985.80 = 12,128,500.40 : x
  2. Step 2: Convert to fraction form
    20,190,657.20/30,285,985.80 = 12,128,500.40/x
  3. Step 3: Cross multiply
    20,190,657.20x = 30,285,985.80 × 12,128,500.40
  4. Step 4: Simplify right side
    20,190,657.20x = 367,323,590,889,694.31
  5. Step 5: Solve for x
    x = 367,323,590,889,694.31/20,190,657.20
  6. Step 6: Final answer
    x = 18,192,750.60

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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.