Home / 21,241.68-31,869-10,860.72

Finding the Fourth Proportional to 21,241.68, 31,869 and 10,860.72

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Solution

The fourth proportional to 21,241.68, 31,869 and 10,860.72 is: 16,294.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,241.68 : 31,869 = 10,860.72 : x
  2. Step 2: Convert to fraction form
    21,241.68/31,869 = 10,860.72/x
  3. Step 3: Cross multiply
    21,241.68x = 31,869 × 10,860.72
  4. Step 4: Simplify right side
    21,241.68x = 346,120,285.68
  5. Step 5: Solve for x
    x = 346,120,285.68/21,241.68
  6. Step 6: Final answer
    x = 16,294.39

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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.