Home / 21,439.36-32,208.48-20,553.64

Finding the Fourth Proportional to 21,439.36, 32,208.48 and 20,553.64

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Solution

The fourth proportional to 21,439.36, 32,208.48 and 20,553.64 is: 30,877.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,439.36 : 32,208.48 = 20,553.64 : x
  2. Step 2: Convert to fraction form
    21,439.36/32,208.48 = 20,553.64/x
  3. Step 3: Cross multiply
    21,439.36x = 32,208.48 × 20,553.64
  4. Step 4: Simplify right side
    21,439.36x = 662,001,502.87
  5. Step 5: Solve for x
    x = 662,001,502.87/21,439.36
  6. Step 6: Final answer
    x = 30,877.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.