Home / 20,983.84-28,958.52-11,553.28

Finding the Fourth Proportional to 20,983.84, 28,958.52 and 11,553.28

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Solution

The fourth proportional to 20,983.84, 28,958.52 and 11,553.28 is: 15,943.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.84 : 28,958.52 = 11,553.28 : x
  2. Step 2: Convert to fraction form
    20,983.84/28,958.52 = 11,553.28/x
  3. Step 3: Cross multiply
    20,983.84x = 28,958.52 × 11,553.28
  4. Step 4: Simplify right side
    20,983.84x = 334,565,889.95
  5. Step 5: Solve for x
    x = 334,565,889.95/20,983.84
  6. Step 6: Final answer
    x = 15,943.98

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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.