Home / 20,690.84-28,553.40-11,259.40

Finding the Fourth Proportional to 20,690.84, 28,553.40 and 11,259.40

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Solution

The fourth proportional to 20,690.84, 28,553.40 and 11,259.40 is: 15,537.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.84 : 28,553.40 = 11,259.40 : x
  2. Step 2: Convert to fraction form
    20,690.84/28,553.40 = 11,259.40/x
  3. Step 3: Cross multiply
    20,690.84x = 28,553.40 × 11,259.40
  4. Step 4: Simplify right side
    20,690.84x = 321,494,151.96
  5. Step 5: Solve for x
    x = 321,494,151.96/20,690.84
  6. Step 6: Final answer
    x = 15,537.99

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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.