Home / 28,085,864.80-42,035,485.20-20,387,624.80

Finding the Fourth Proportional to 28,085,864.80, 42,035,485.20 and 20,387,624.80

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Solution

The fourth proportional to 28,085,864.80, 42,035,485.20 and 20,387,624.80 is: 30,513,701.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,085,864.80 : 42,035,485.20 = 20,387,624.80 : x
  2. Step 2: Convert to fraction form
    28,085,864.80/42,035,485.20 = 20,387,624.80/x
  3. Step 3: Cross multiply
    28,085,864.80x = 42,035,485.20 × 20,387,624.80
  4. Step 4: Simplify right side
    28,085,864.80x = 857,003,700,543,553
  5. Step 5: Solve for x
    x = 857,003,700,543,553/28,085,864.80
  6. Step 6: Final answer
    x = 30,513,701.70

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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.