Home / 20,641.32-28,485.18-11,209.92

Finding the Fourth Proportional to 20,641.32, 28,485.18 and 11,209.92

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Solution

The fourth proportional to 20,641.32, 28,485.18 and 11,209.92 is: 15,469.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.32 : 28,485.18 = 11,209.92 : x
  2. Step 2: Convert to fraction form
    20,641.32/28,485.18 = 11,209.92/x
  3. Step 3: Cross multiply
    20,641.32x = 28,485.18 × 11,209.92
  4. Step 4: Simplify right side
    20,641.32x = 319,316,588.99
  5. Step 5: Solve for x
    x = 319,316,588.99/20,641.32
  6. Step 6: Final answer
    x = 15,469.78

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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.