Home / 20,520,428.49-28,317,980.03-11,353,136.85

Finding the Fourth Proportional to 20,520,428.49, 28,317,980.03 and 11,353,136.85

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Solution

The fourth proportional to 20,520,428.49, 28,317,980.03 and 11,353,136.85 is: 15,667,211.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520,428.49 : 28,317,980.03 = 11,353,136.85 : x
  2. Step 2: Convert to fraction form
    20,520,428.49/28,317,980.03 = 11,353,136.85/x
  3. Step 3: Cross multiply
    20,520,428.49x = 28,317,980.03 × 11,353,136.85
  4. Step 4: Simplify right side
    20,520,428.49x = 321,497,902,539,391.38
  5. Step 5: Solve for x
    x = 321,497,902,539,391.38/20,520,428.49
  6. Step 6: Final answer
    x = 15,667,211.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.