Home / 20,865,712.60-31,307,900.10-7,412,195.80

Finding the Fourth Proportional to 20,865,712.60, 31,307,900.10 and 7,412,195.80

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Solution

The fourth proportional to 20,865,712.60, 31,307,900.10 and 7,412,195.80 is: 11,121,608.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865,712.60 : 31,307,900.10 = 7,412,195.80 : x
  2. Step 2: Convert to fraction form
    20,865,712.60/31,307,900.10 = 7,412,195.80/x
  3. Step 3: Cross multiply
    20,865,712.60x = 31,307,900.10 × 7,412,195.80
  4. Step 4: Simplify right side
    20,865,712.60x = 232,060,285,628,039.59
  5. Step 5: Solve for x
    x = 232,060,285,628,039.59/20,865,712.60
  6. Step 6: Final answer
    x = 11,121,608.45

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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.