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Finding the Fourth Proportional to 20,246,473.20, 30,369,709.80 and 18,687,579.60

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Solution

The fourth proportional to 20,246,473.20, 30,369,709.80 and 18,687,579.60 is: 28,031,369.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,246,473.20 : 30,369,709.80 = 18,687,579.60 : x
  2. Step 2: Convert to fraction form
    20,246,473.20/30,369,709.80 = 18,687,579.60/x
  3. Step 3: Cross multiply
    20,246,473.20x = 30,369,709.80 × 18,687,579.60
  4. Step 4: Simplify right side
    20,246,473.20x = 567,536,369,316,400.12
  5. Step 5: Solve for x
    x = 567,536,369,316,400.12/20,246,473.20
  6. Step 6: Final answer
    x = 28,031,369.40

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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.