Home / 12,128,424.70-18,192,637.05-11,650,127.80

Finding the Fourth Proportional to 12,128,424.70, 18,192,637.05 and 11,650,127.80

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Solution

The fourth proportional to 12,128,424.70, 18,192,637.05 and 11,650,127.80 is: 17,475,191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,424.70 : 18,192,637.05 = 11,650,127.80 : x
  2. Step 2: Convert to fraction form
    12,128,424.70/18,192,637.05 = 11,650,127.80/x
  3. Step 3: Cross multiply
    12,128,424.70x = 18,192,637.05 × 11,650,127.80
  4. Step 4: Simplify right side
    12,128,424.70x = 211,946,546,651,515
  5. Step 5: Solve for x
    x = 211,946,546,651,515/12,128,424.70
  6. Step 6: Final answer
    x = 17,475,191.70

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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.