Home / 12,085,643.80-18,128,465.70-11,959,672.60

Finding the Fourth Proportional to 12,085,643.80, 18,128,465.70 and 11,959,672.60

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Solution

The fourth proportional to 12,085,643.80, 18,128,465.70 and 11,959,672.60 is: 17,939,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,085,643.80 : 18,128,465.70 = 11,959,672.60 : x
  2. Step 2: Convert to fraction form
    12,085,643.80/18,128,465.70 = 11,959,672.60/x
  3. Step 3: Cross multiply
    12,085,643.80x = 18,128,465.70 × 11,959,672.60
  4. Step 4: Simplify right side
    12,085,643.80x = 216,810,514,512,329.81
  5. Step 5: Solve for x
    x = 216,810,514,512,329.81/12,085,643.80
  6. Step 6: Final answer
    x = 17,939,508.90

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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.