Home / 18,661,153.40-27,991,730.10-7,890,615.80

Finding the Fourth Proportional to 18,661,153.40, 27,991,730.10 and 7,890,615.80

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Solution

The fourth proportional to 18,661,153.40, 27,991,730.10 and 7,890,615.80 is: 11,835,923.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661,153.40 : 27,991,730.10 = 7,890,615.80 : x
  2. Step 2: Convert to fraction form
    18,661,153.40/27,991,730.10 = 7,890,615.80/x
  3. Step 3: Cross multiply
    18,661,153.40x = 27,991,730.10 × 7,890,615.80
  4. Step 4: Simplify right side
    18,661,153.40x = 220,871,987,796,395.59
  5. Step 5: Solve for x
    x = 220,871,987,796,395.59/18,661,153.40
  6. Step 6: Final answer
    x = 11,835,923.70

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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.