Home / 20,696,112.45-31,020,627.65-12,591,222.21

Finding the Fourth Proportional to 20,696,112.45, 31,020,627.65 and 12,591,222.21

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Solution

The fourth proportional to 20,696,112.45, 31,020,627.65 and 12,591,222.21 is: 18,872,511.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,696,112.45 : 31,020,627.65 = 12,591,222.21 : x
  2. Step 2: Convert to fraction form
    20,696,112.45/31,020,627.65 = 12,591,222.21/x
  3. Step 3: Cross multiply
    20,696,112.45x = 31,020,627.65 × 12,591,222.21
  4. Step 4: Simplify right side
    20,696,112.45x = 390,587,615,771,864
  5. Step 5: Solve for x
    x = 390,587,615,771,864/20,696,112.45
  6. Step 6: Final answer
    x = 18,872,511.29

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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.