Home / 28,085,860.80-42,035,479.20-20,387,620.80

Finding the Fourth Proportional to 28,085,860.80, 42,035,479.20 and 20,387,620.80

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Solution

The fourth proportional to 28,085,860.80, 42,035,479.20 and 20,387,620.80 is: 30,513,695.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085,860.80 : 42,035,479.20 = 20,387,620.80 : x
  2. Step 2: Convert to fraction form
    28,085,860.80/42,035,479.20 = 20,387,620.80/x
  3. Step 3: Cross multiply
    28,085,860.80x = 42,035,479.20 × 20,387,620.80
  4. Step 4: Simplify right side
    28,085,860.80x = 857,003,410,075,887.50
  5. Step 5: Solve for x
    x = 857,003,410,075,887.50/28,085,860.80
  6. Step 6: Final answer
    x = 30,513,695.71

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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.