Home / 12,128,438.40-18,150,667.20-11,120,668.80

Finding the Fourth Proportional to 12,128,438.40, 18,150,667.20 and 11,120,668.80

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Solution

The fourth proportional to 12,128,438.40, 18,150,667.20 and 11,120,668.80 is: 16,642,501.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,438.40 : 18,150,667.20 = 11,120,668.80 : x
  2. Step 2: Convert to fraction form
    12,128,438.40/18,150,667.20 = 11,120,668.80/x
  3. Step 3: Cross multiply
    12,128,438.40x = 18,150,667.20 × 11,120,668.80
  4. Step 4: Simplify right side
    12,128,438.40x = 201,847,558,430,223.38
  5. Step 5: Solve for x
    x = 201,847,558,430,223.38/12,128,438.40
  6. Step 6: Final answer
    x = 16,642,501.84

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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.