Home / 21,008.22-31,503.15-11,145.30

Finding the Fourth Proportional to 21,008.22, 31,503.15 and 11,145.30

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Solution

The fourth proportional to 21,008.22, 31,503.15 and 11,145.30 is: 16,713.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.22 : 31,503.15 = 11,145.30 : x
  2. Step 2: Convert to fraction form
    21,008.22/31,503.15 = 11,145.30/x
  3. Step 3: Cross multiply
    21,008.22x = 31,503.15 × 11,145.30
  4. Step 4: Simplify right side
    21,008.22x = 351,112,057.70
  5. Step 5: Solve for x
    x = 351,112,057.70/21,008.22
  6. Step 6: Final answer
    x = 16,713.08

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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.