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Finding the Fourth Proportional to 12,984,416.40, 19,476,624.60 and 12,488,404.80

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Solution

The fourth proportional to 12,984,416.40, 19,476,624.60 and 12,488,404.80 is: 18,732,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,984,416.40 : 19,476,624.60 = 12,488,404.80 : x
  2. Step 2: Convert to fraction form
    12,984,416.40/19,476,624.60 = 12,488,404.80/x
  3. Step 3: Cross multiply
    12,984,416.40x = 19,476,624.60 × 12,488,404.80
  4. Step 4: Simplify right side
    12,984,416.40x = 243,231,972,142,438.12
  5. Step 5: Solve for x
    x = 243,231,972,142,438.12/12,984,416.40
  6. Step 6: Final answer
    x = 18,732,607.20

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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.