Home / 21,221.60-31,881.36-13,348.64

Finding the Fourth Proportional to 21,221.60, 31,881.36 and 13,348.64

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Solution

The fourth proportional to 21,221.60, 31,881.36 and 13,348.64 is: 20,053.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.60 : 31,881.36 = 13,348.64 : x
  2. Step 2: Convert to fraction form
    21,221.60/31,881.36 = 13,348.64/x
  3. Step 3: Cross multiply
    21,221.60x = 31,881.36 × 13,348.64
  4. Step 4: Simplify right side
    21,221.60x = 425,572,797.35
  5. Step 5: Solve for x
    x = 425,572,797.35/21,221.60
  6. Step 6: Final answer
    x = 20,053.76

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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.