Home / 20,464.30-28,238.20-12,907.77

Finding the Fourth Proportional to 20,464.30, 28,238.20 and 12,907.77

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Solution

The fourth proportional to 20,464.30, 28,238.20 and 12,907.77 is: 17,811.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,464.30 : 28,238.20 = 12,907.77 : x
  2. Step 2: Convert to fraction form
    20,464.30/28,238.20 = 12,907.77/x
  3. Step 3: Cross multiply
    20,464.30x = 28,238.20 × 12,907.77
  4. Step 4: Simplify right side
    20,464.30x = 364,492,190.81
  5. Step 5: Solve for x
    x = 364,492,190.81/20,464.30
  6. Step 6: Final answer
    x = 17,811.13

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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.