Home / 20,915,861-28,859,410.80-12,210,082.40

Finding the Fourth Proportional to 20,915,861, 28,859,410.80 and 12,210,082.40

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Solution

The fourth proportional to 20,915,861, 28,859,410.80 and 12,210,082.40 is: 16,847,299.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915,861 : 28,859,410.80 = 12,210,082.40 : x
  2. Step 2: Convert to fraction form
    20,915,861/28,859,410.80 = 12,210,082.40/x
  3. Step 3: Cross multiply
    20,915,861x = 28,859,410.80 × 12,210,082.40
  4. Step 4: Simplify right side
    20,915,861x = 352,375,783,883,449.94
  5. Step 5: Solve for x
    x = 352,375,783,883,449.94/20,915,861
  6. Step 6: Final answer
    x = 16,847,299.95

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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.