Home / 20,905,363.80-31,358,045.70-19,560,153.78

Finding the Fourth Proportional to 20,905,363.80, 31,358,045.70 and 19,560,153.78

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Solution

The fourth proportional to 20,905,363.80, 31,358,045.70 and 19,560,153.78 is: 29,340,230.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905,363.80 : 31,358,045.70 = 19,560,153.78 : x
  2. Step 2: Convert to fraction form
    20,905,363.80/31,358,045.70 = 19,560,153.78/x
  3. Step 3: Cross multiply
    20,905,363.80x = 31,358,045.70 × 19,560,153.78
  4. Step 4: Simplify right side
    20,905,363.80x = 613,368,196,132,267.75
  5. Step 5: Solve for x
    x = 613,368,196,132,267.75/20,905,363.80
  6. Step 6: Final answer
    x = 29,340,230.67

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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.