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Finding the Fourth Proportional to 18,592,506.80, 27,890,366.70 and 5,129,334.80

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Solution

The fourth proportional to 18,592,506.80, 27,890,366.70 and 5,129,334.80 is: 7,694,445.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,592,506.80 : 27,890,366.70 = 5,129,334.80 : x
  2. Step 2: Convert to fraction form
    18,592,506.80/27,890,366.70 = 5,129,334.80/x
  3. Step 3: Cross multiply
    18,592,506.80x = 27,890,366.70 × 5,129,334.80
  4. Step 4: Simplify right side
    18,592,506.80x = 143,059,028,499,071.16
  5. Step 5: Solve for x
    x = 143,059,028,499,071.16/18,592,506.80
  6. Step 6: Final answer
    x = 7,694,445.40

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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.