Home / 20,800,505.60-28,713,891.50-12,430,828.05

Finding the Fourth Proportional to 20,800,505.60, 28,713,891.50 and 12,430,828.05

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Solution

The fourth proportional to 20,800,505.60, 28,713,891.50 and 12,430,828.05 is: 17,160,037.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800,505.60 : 28,713,891.50 = 12,430,828.05 : x
  2. Step 2: Convert to fraction form
    20,800,505.60/28,713,891.50 = 12,430,828.05/x
  3. Step 3: Cross multiply
    20,800,505.60x = 28,713,891.50 × 12,430,828.05
  4. Step 4: Simplify right side
    20,800,505.60x = 356,937,447,882,856.62
  5. Step 5: Solve for x
    x = 356,937,447,882,856.62/20,800,505.60
  6. Step 6: Final answer
    x = 17,160,037.10

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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.