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Finding the Fourth Proportional to 18,714,746.40, 28,024,880.40 and 12,290,215.20

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Solution

The fourth proportional to 18,714,746.40, 28,024,880.40 and 12,290,215.20 is: 18,404,300.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,714,746.40 : 28,024,880.40 = 12,290,215.20 : x
  2. Step 2: Convert to fraction form
    18,714,746.40/28,024,880.40 = 12,290,215.20/x
  3. Step 3: Cross multiply
    18,714,746.40x = 28,024,880.40 × 12,290,215.20
  4. Step 4: Simplify right side
    18,714,746.40x = 344,431,811,070,262.06
  5. Step 5: Solve for x
    x = 344,431,811,070,262.06/18,714,746.40
  6. Step 6: Final answer
    x = 18,404,300.21

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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.