Home / 21,338.88-31,999.76-8,850.40

Finding the Fourth Proportional to 21,338.88, 31,999.76 and 8,850.40

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Solution

The fourth proportional to 21,338.88, 31,999.76 and 8,850.40 is: 13,272.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.88 : 31,999.76 = 8,850.40 : x
  2. Step 2: Convert to fraction form
    21,338.88/31,999.76 = 8,850.40/x
  3. Step 3: Cross multiply
    21,338.88x = 31,999.76 × 8,850.40
  4. Step 4: Simplify right side
    21,338.88x = 283,210,675.90
  5. Step 5: Solve for x
    x = 283,210,675.90/21,338.88
  6. Step 6: Final answer
    x = 13,272.05

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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.