Home / 20,688,205.75-28,519,074.95-13,244,803.70

Finding the Fourth Proportional to 20,688,205.75, 28,519,074.95 and 13,244,803.70

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Solution

The fourth proportional to 20,688,205.75, 28,519,074.95 and 13,244,803.70 is: 18,258,207.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688,205.75 : 28,519,074.95 = 13,244,803.70 : x
  2. Step 2: Convert to fraction form
    20,688,205.75/28,519,074.95 = 13,244,803.70/x
  3. Step 3: Cross multiply
    20,688,205.75x = 28,519,074.95 × 13,244,803.70
  4. Step 4: Simplify right side
    20,688,205.75x = 377,729,549,209,517.94
  5. Step 5: Solve for x
    x = 377,729,549,209,517.94/20,688,205.75
  6. Step 6: Final answer
    x = 18,258,207.30

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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.