Home / 30,728,028.32-42,355,429.48-20,801,780.70

Finding the Fourth Proportional to 30,728,028.32, 42,355,429.48 and 20,801,780.70

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Solution

The fourth proportional to 30,728,028.32, 42,355,429.48 and 20,801,780.70 is: 28,673,117.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,728,028.32 : 42,355,429.48 = 20,801,780.70 : x
  2. Step 2: Convert to fraction form
    30,728,028.32/42,355,429.48 = 20,801,780.70/x
  3. Step 3: Cross multiply
    30,728,028.32x = 42,355,429.48 × 20,801,780.70
  4. Step 4: Simplify right side
    30,728,028.32x = 881,068,355,497,274.88
  5. Step 5: Solve for x
    x = 881,068,355,497,274.88/30,728,028.32
  6. Step 6: Final answer
    x = 28,673,117.14

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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.