Home / 12,142,869.80-18,209,120.02-7,028,829.66

Finding the Fourth Proportional to 12,142,869.80, 18,209,120.02 and 7,028,829.66

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Solution

The fourth proportional to 12,142,869.80, 18,209,120.02 and 7,028,829.66 is: 10,540,243.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,142,869.80 : 18,209,120.02 = 7,028,829.66 : x
  2. Step 2: Convert to fraction form
    12,142,869.80/18,209,120.02 = 7,028,829.66/x
  3. Step 3: Cross multiply
    12,142,869.80x = 18,209,120.02 × 7,028,829.66
  4. Step 4: Simplify right side
    12,142,869.80x = 127,988,802,866,898.80
  5. Step 5: Solve for x
    x = 127,988,802,866,898.80/12,142,869.80
  6. Step 6: Final answer
    x = 10,540,243.37

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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.