Home / 18,678,627.20-28,017,940.80-5,215,433.60

Finding the Fourth Proportional to 18,678,627.20, 28,017,940.80 and 5,215,433.60

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Solution

The fourth proportional to 18,678,627.20, 28,017,940.80 and 5,215,433.60 is: 7,823,150.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678,627.20 : 28,017,940.80 = 5,215,433.60 : x
  2. Step 2: Convert to fraction form
    18,678,627.20/28,017,940.80 = 5,215,433.60/x
  3. Step 3: Cross multiply
    18,678,627.20x = 28,017,940.80 × 5,215,433.60
  4. Step 4: Simplify right side
    18,678,627.20x = 146,125,709,851,130.88
  5. Step 5: Solve for x
    x = 146,125,709,851,130.88/18,678,627.20
  6. Step 6: Final answer
    x = 7,823,150.40

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1.5x scale

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.