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Finding the Fourth Proportional to 12,491,459.20, 18,709,195.20 and 10,251,971.20

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Solution

The fourth proportional to 12,491,459.20, 18,709,195.20 and 10,251,971.20 is: 15,354,981.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491,459.20 : 18,709,195.20 = 10,251,971.20 : x
  2. Step 2: Convert to fraction form
    12,491,459.20/18,709,195.20 = 10,251,971.20/x
  3. Step 3: Cross multiply
    12,491,459.20x = 18,709,195.20 × 10,251,971.20
  4. Step 4: Simplify right side
    12,491,459.20x = 191,806,130,365,578.22
  5. Step 5: Solve for x
    x = 191,806,130,365,578.22/12,491,459.20
  6. Step 6: Final answer
    x = 15,354,981.94

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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.