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Finding the Fourth Proportional to 12,473,983.80, 18,696,978.90 and 7,085,215.80

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Solution

The fourth proportional to 12,473,983.80, 18,696,978.90 and 7,085,215.80 is: 10,619,873.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,473,983.80 : 18,696,978.90 = 7,085,215.80 : x
  2. Step 2: Convert to fraction form
    12,473,983.80/18,696,978.90 = 7,085,215.80/x
  3. Step 3: Cross multiply
    12,473,983.80x = 18,696,978.90 × 7,085,215.80
  4. Step 4: Simplify right side
    12,473,983.80x = 132,472,130,314,546.61
  5. Step 5: Solve for x
    x = 132,472,130,314,546.61/12,473,983.80
  6. Step 6: Final answer
    x = 10,619,873.53

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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.