Home / 15,493.39-21,381.29-8,419.81

Finding the Fourth Proportional to 15,493.39, 21,381.29 and 8,419.81

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Solution

The fourth proportional to 15,493.39, 21,381.29 and 8,419.81 is: 11,619.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.39 : 21,381.29 = 8,419.81 : x
  2. Step 2: Convert to fraction form
    15,493.39/21,381.29 = 8,419.81/x
  3. Step 3: Cross multiply
    15,493.39x = 21,381.29 × 8,419.81
  4. Step 4: Simplify right side
    15,493.39x = 180,026,399.35
  5. Step 5: Solve for x
    x = 180,026,399.35/15,493.39
  6. Step 6: Final answer
    x = 11,619.56

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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.