Home / 20,787,128.80-31,164,104.40-8,810,015.20

Finding the Fourth Proportional to 20,787,128.80, 31,164,104.40 and 8,810,015.20

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Solution

The fourth proportional to 20,787,128.80, 31,164,104.40 and 8,810,015.20 is: 13,207,992.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787,128.80 : 31,164,104.40 = 8,810,015.20 : x
  2. Step 2: Convert to fraction form
    20,787,128.80/31,164,104.40 = 8,810,015.20/x
  3. Step 3: Cross multiply
    20,787,128.80x = 31,164,104.40 × 8,810,015.20
  4. Step 4: Simplify right side
    20,787,128.80x = 274,556,233,458,386.84
  5. Step 5: Solve for x
    x = 274,556,233,458,386.84/20,787,128.80
  6. Step 6: Final answer
    x = 13,207,992.12

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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.