Home / 21,912.19-30,263.75-14,729.63

Finding the Fourth Proportional to 21,912.19, 30,263.75 and 14,729.63

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Solution

The fourth proportional to 21,912.19, 30,263.75 and 14,729.63 is: 20,343.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.19 : 30,263.75 = 14,729.63 : x
  2. Step 2: Convert to fraction form
    21,912.19/30,263.75 = 14,729.63/x
  3. Step 3: Cross multiply
    21,912.19x = 30,263.75 × 14,729.63
  4. Step 4: Simplify right side
    21,912.19x = 445,773,839.91
  5. Step 5: Solve for x
    x = 445,773,839.91/21,912.19
  6. Step 6: Final answer
    x = 20,343.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.