Home / 28,085,865.80-42,035,486.70-20,387,625.80

Finding the Fourth Proportional to 28,085,865.80, 42,035,486.70 and 20,387,625.80

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Solution

The fourth proportional to 28,085,865.80, 42,035,486.70 and 20,387,625.80 is: 30,513,703.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085,865.80 : 42,035,486.70 = 20,387,625.80 : x
  2. Step 2: Convert to fraction form
    28,085,865.80/42,035,486.70 = 20,387,625.80/x
  3. Step 3: Cross multiply
    28,085,865.80x = 42,035,486.70 × 20,387,625.80
  4. Step 4: Simplify right side
    28,085,865.80x = 857,003,773,160,477
  5. Step 5: Solve for x
    x = 857,003,773,160,477/28,085,865.80
  6. Step 6: Final answer
    x = 30,513,703.20

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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.