Home / 20,875.48-28,791.12-12,910.12

Finding the Fourth Proportional to 20,875.48, 28,791.12 and 12,910.12

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Solution

The fourth proportional to 20,875.48, 28,791.12 and 12,910.12 is: 17,805.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.48 : 28,791.12 = 12,910.12 : x
  2. Step 2: Convert to fraction form
    20,875.48/28,791.12 = 12,910.12/x
  3. Step 3: Cross multiply
    20,875.48x = 28,791.12 × 12,910.12
  4. Step 4: Simplify right side
    20,875.48x = 371,696,814.13
  5. Step 5: Solve for x
    x = 371,696,814.13/20,875.48
  6. Step 6: Final answer
    x = 17,805.43

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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.