Home / 22,749.80-31,499.70-21,000.20

Finding the Fourth Proportional to 22,749.80, 31,499.70 and 21,000.20

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Solution

The fourth proportional to 22,749.80, 31,499.70 and 21,000.20 is: 29,077.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,749.80 : 31,499.70 = 21,000.20 : x
  2. Step 2: Convert to fraction form
    22,749.80/31,499.70 = 21,000.20/x
  3. Step 3: Cross multiply
    22,749.80x = 31,499.70 × 21,000.20
  4. Step 4: Simplify right side
    22,749.80x = 661,499,999.94
  5. Step 5: Solve for x
    x = 661,499,999.94/22,749.80
  6. Step 6: Final answer
    x = 29,077.18

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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.