Home / 13,702,739.31-18,909,057.78-7,822,140.12

Finding the Fourth Proportional to 13,702,739.31, 18,909,057.78 and 7,822,140.12

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Solution

The fourth proportional to 13,702,739.31, 18,909,057.78 and 7,822,140.12 is: 10,794,140.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,702,739.31 : 18,909,057.78 = 7,822,140.12 : x
  2. Step 2: Convert to fraction form
    13,702,739.31/18,909,057.78 = 7,822,140.12/x
  3. Step 3: Cross multiply
    13,702,739.31x = 18,909,057.78 × 7,822,140.12
  4. Step 4: Simplify right side
    13,702,739.31x = 147,909,299,492,336.16
  5. Step 5: Solve for x
    x = 147,909,299,492,336.16/13,702,739.31
  6. Step 6: Final answer
    x = 10,794,140.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.