Home / 22,359.36-30,999.28-21,115.20

Finding the Fourth Proportional to 22,359.36, 30,999.28 and 21,115.20

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Solution

The fourth proportional to 22,359.36, 30,999.28 and 21,115.20 is: 29,274.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,359.36 : 30,999.28 = 21,115.20 : x
  2. Step 2: Convert to fraction form
    22,359.36/30,999.28 = 21,115.20/x
  3. Step 3: Cross multiply
    22,359.36x = 30,999.28 × 21,115.20
  4. Step 4: Simplify right side
    22,359.36x = 654,555,997.06
  5. Step 5: Solve for x
    x = 654,555,997.06/22,359.36
  6. Step 6: Final answer
    x = 29,274.36

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Half scale
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Double scale
Find fourth proportional to 22,360.36, 31,000.67 and 21,116.20
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.