Home / 21,273.64-29,357.20-13,320.25

Finding the Fourth Proportional to 21,273.64, 29,357.20 and 13,320.25

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Solution

The fourth proportional to 21,273.64, 29,357.20 and 13,320.25 is: 18,381.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.64 : 29,357.20 = 13,320.25 : x
  2. Step 2: Convert to fraction form
    21,273.64/29,357.20 = 13,320.25/x
  3. Step 3: Cross multiply
    21,273.64x = 29,357.20 × 13,320.25
  4. Step 4: Simplify right side
    21,273.64x = 391,045,243.30
  5. Step 5: Solve for x
    x = 391,045,243.30/21,273.64
  6. Step 6: Final answer
    x = 18,381.68

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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.