Home / 21,161.40-29,178.75-13,494.43

Finding the Fourth Proportional to 21,161.40, 29,178.75 and 13,494.43

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Solution

The fourth proportional to 21,161.40, 29,178.75 and 13,494.43 is: 18,607.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.40 : 29,178.75 = 13,494.43 : x
  2. Step 2: Convert to fraction form
    21,161.40/29,178.75 = 13,494.43/x
  3. Step 3: Cross multiply
    21,161.40x = 29,178.75 × 13,494.43
  4. Step 4: Simplify right side
    21,161.40x = 393,750,599.36
  5. Step 5: Solve for x
    x = 393,750,599.36/21,161.40
  6. Step 6: Final answer
    x = 18,607.02

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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.