Home / 21,278.23-31,857.33-11,260.28

Finding the Fourth Proportional to 21,278.23, 31,857.33 and 11,260.28

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Solution

The fourth proportional to 21,278.23, 31,857.33 and 11,260.28 is: 16,858.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.23 : 31,857.33 = 11,260.28 : x
  2. Step 2: Convert to fraction form
    21,278.23/31,857.33 = 11,260.28/x
  3. Step 3: Cross multiply
    21,278.23x = 31,857.33 × 11,260.28
  4. Step 4: Simplify right side
    21,278.23x = 358,722,577.72
  5. Step 5: Solve for x
    x = 358,722,577.72/21,278.23
  6. Step 6: Final answer
    x = 16,858.67

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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.