Home / 20,502,820.40-30,733,235.40-11,978,769.20

Finding the Fourth Proportional to 20,502,820.40, 30,733,235.40 and 11,978,769.20

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Solution

The fourth proportional to 20,502,820.40, 30,733,235.40 and 11,978,769.20 is: 17,955,887.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,502,820.40 : 30,733,235.40 = 11,978,769.20 : x
  2. Step 2: Convert to fraction form
    20,502,820.40/30,733,235.40 = 11,978,769.20/x
  3. Step 3: Cross multiply
    20,502,820.40x = 30,733,235.40 × 11,978,769.20
  4. Step 4: Simplify right side
    20,502,820.40x = 368,146,333,625,869.62
  5. Step 5: Solve for x
    x = 368,146,333,625,869.62/20,502,820.40
  6. Step 6: Final answer
    x = 17,955,887.36

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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.