Home / 21,011.46-28,994.67-11,579.28

Finding the Fourth Proportional to 21,011.46, 28,994.67 and 11,579.28

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Solution

The fourth proportional to 21,011.46, 28,994.67 and 11,579.28 is: 15,978.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.46 : 28,994.67 = 11,579.28 : x
  2. Step 2: Convert to fraction form
    21,011.46/28,994.67 = 11,579.28/x
  3. Step 3: Cross multiply
    21,011.46x = 28,994.67 × 11,579.28
  4. Step 4: Simplify right side
    21,011.46x = 335,737,402.44
  5. Step 5: Solve for x
    x = 335,737,402.44/21,011.46
  6. Step 6: Final answer
    x = 15,978.78

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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.