Home / 7,820,999.40-11,731,499.10-7,128,157.80

Finding the Fourth Proportional to 7,820,999.40, 11,731,499.10 and 7,128,157.80

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Solution

The fourth proportional to 7,820,999.40, 11,731,499.10 and 7,128,157.80 is: 10,692,236.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,820,999.40 : 11,731,499.10 = 7,128,157.80 : x
  2. Step 2: Convert to fraction form
    7,820,999.40/11,731,499.10 = 7,128,157.80/x
  3. Step 3: Cross multiply
    7,820,999.40x = 11,731,499.10 × 7,128,157.80
  4. Step 4: Simplify right side
    7,820,999.40x = 83,623,976,815,357.97
  5. Step 5: Solve for x
    x = 83,623,976,815,357.97/7,820,999.40
  6. Step 6: Final answer
    x = 10,692,236.70

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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.