Home / 20,437.11-28,205.82-12,477.65

Finding the Fourth Proportional to 20,437.11, 28,205.82 and 12,477.65

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Solution

The fourth proportional to 20,437.11, 28,205.82 and 12,477.65 is: 17,220.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,437.11 : 28,205.82 = 12,477.65 : x
  2. Step 2: Convert to fraction form
    20,437.11/28,205.82 = 12,477.65/x
  3. Step 3: Cross multiply
    20,437.11x = 28,205.82 × 12,477.65
  4. Step 4: Simplify right side
    20,437.11x = 351,942,208.89
  5. Step 5: Solve for x
    x = 351,942,208.89/20,437.11
  6. Step 6: Final answer
    x = 17,220.74

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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.