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Finding the Fourth Proportional to 13,387,541.20, 20,081,311.80 and 12,463,752.40

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Solution

The fourth proportional to 13,387,541.20, 20,081,311.80 and 12,463,752.40 is: 18,695,628.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387,541.20 : 20,081,311.80 = 12,463,752.40 : x
  2. Step 2: Convert to fraction form
    13,387,541.20/20,081,311.80 = 12,463,752.40/x
  3. Step 3: Cross multiply
    13,387,541.20x = 20,081,311.80 × 12,463,752.40
  4. Step 4: Simplify right side
    13,387,541.20x = 250,288,498,142,398.34
  5. Step 5: Solve for x
    x = 250,288,498,142,398.34/13,387,541.20
  6. Step 6: Final answer
    x = 18,695,628.60

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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.