Home / 21,508.16-29,628.32-18,311.20

Finding the Fourth Proportional to 21,508.16, 29,628.32 and 18,311.20

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Solution

The fourth proportional to 21,508.16, 29,628.32 and 18,311.20 is: 25,224.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,508.16 : 29,628.32 = 18,311.20 : x
  2. Step 2: Convert to fraction form
    21,508.16/29,628.32 = 18,311.20/x
  3. Step 3: Cross multiply
    21,508.16x = 29,628.32 × 18,311.20
  4. Step 4: Simplify right side
    21,508.16x = 542,530,093.18
  5. Step 5: Solve for x
    x = 542,530,093.18/21,508.16
  6. Step 6: Final answer
    x = 25,224.38

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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.