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Finding the Fourth Proportional to 20,118,988.40, 30,186,355.80 and 7,340,784.80

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Solution

The fourth proportional to 20,118,988.40, 30,186,355.80 and 7,340,784.80 is: 11,014,049.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118,988.40 : 30,186,355.80 = 7,340,784.80 : x
  2. Step 2: Convert to fraction form
    20,118,988.40/30,186,355.80 = 7,340,784.80/x
  3. Step 3: Cross multiply
    20,118,988.40x = 30,186,355.80 × 7,340,784.80
  4. Step 4: Simplify right side
    20,118,988.40x = 221,591,541,824,031.84
  5. Step 5: Solve for x
    x = 221,591,541,824,031.84/20,118,988.40
  6. Step 6: Final answer
    x = 11,014,049.88

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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.