Home / 28,085,852.80-42,035,467.20-20,387,612.80

Finding the Fourth Proportional to 28,085,852.80, 42,035,467.20 and 20,387,612.80

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Solution

The fourth proportional to 28,085,852.80, 42,035,467.20 and 20,387,612.80 is: 30,513,683.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085,852.80 : 42,035,467.20 = 20,387,612.80 : x
  2. Step 2: Convert to fraction form
    28,085,852.80/42,035,467.20 = 20,387,612.80/x
  3. Step 3: Cross multiply
    28,085,852.80x = 42,035,467.20 × 20,387,612.80
  4. Step 4: Simplify right side
    28,085,852.80x = 857,002,829,140,700.25
  5. Step 5: Solve for x
    x = 857,002,829,140,700.25/28,085,852.80
  6. Step 6: Final answer
    x = 30,513,683.71

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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.