Home / 20,687.22-28,547.82-12,190.14

Finding the Fourth Proportional to 20,687.22, 28,547.82 and 12,190.14

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Solution

The fourth proportional to 20,687.22, 28,547.82 and 12,190.14 is: 16,822.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.22 : 28,547.82 = 12,190.14 : x
  2. Step 2: Convert to fraction form
    20,687.22/28,547.82 = 12,190.14/x
  3. Step 3: Cross multiply
    20,687.22x = 28,547.82 × 12,190.14
  4. Step 4: Simplify right side
    20,687.22x = 348,001,922.49
  5. Step 5: Solve for x
    x = 348,001,922.49/20,687.22
  6. Step 6: Final answer
    x = 16,822.07

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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.