Home / 21,290.72-31,949.75-14,278.66

Finding the Fourth Proportional to 21,290.72, 31,949.75 and 14,278.66

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Solution

The fourth proportional to 21,290.72, 31,949.75 and 14,278.66 is: 21,427.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.72 : 31,949.75 = 14,278.66 : x
  2. Step 2: Convert to fraction form
    21,290.72/31,949.75 = 14,278.66/x
  3. Step 3: Cross multiply
    21,290.72x = 31,949.75 × 14,278.66
  4. Step 4: Simplify right side
    21,290.72x = 456,199,573.16
  5. Step 5: Solve for x
    x = 456,199,573.16/21,290.72
  6. Step 6: Final answer
    x = 21,427.15

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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.