Home / 20,887.70-28,824.93-11,456.06

Finding the Fourth Proportional to 20,887.70, 28,824.93 and 11,456.06

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Solution

The fourth proportional to 20,887.70, 28,824.93 and 11,456.06 is: 15,809.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.70 : 28,824.93 = 11,456.06 : x
  2. Step 2: Convert to fraction form
    20,887.70/28,824.93 = 11,456.06/x
  3. Step 3: Cross multiply
    20,887.70x = 28,824.93 × 11,456.06
  4. Step 4: Simplify right side
    20,887.70x = 330,219,983.45
  5. Step 5: Solve for x
    x = 330,219,983.45/20,887.70
  6. Step 6: Final answer
    x = 15,809.31

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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.