Home / 20,872.08-28,802.39-12,383.75

Finding the Fourth Proportional to 20,872.08, 28,802.39 and 12,383.75

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Solution

The fourth proportional to 20,872.08, 28,802.39 and 12,383.75 is: 17,088.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.08 : 28,802.39 = 12,383.75 : x
  2. Step 2: Convert to fraction form
    20,872.08/28,802.39 = 12,383.75/x
  3. Step 3: Cross multiply
    20,872.08x = 28,802.39 × 12,383.75
  4. Step 4: Simplify right side
    20,872.08x = 356,681,607.25
  5. Step 5: Solve for x
    x = 356,681,607.25/20,872.08
  6. Step 6: Final answer
    x = 17,088.93

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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.