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Finding the Fourth Proportional to 21,955.88, 30,290.84 and 14,406.38

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Solution

The fourth proportional to 21,955.88, 30,290.84 and 14,406.38 is: 19,875.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,955.88 : 30,290.84 = 14,406.38 : x
  2. Step 2: Convert to fraction form
    21,955.88/30,290.84 = 14,406.38/x
  3. Step 3: Cross multiply
    21,955.88x = 30,290.84 × 14,406.38
  4. Step 4: Simplify right side
    21,955.88x = 436,381,128.07
  5. Step 5: Solve for x
    x = 436,381,128.07/21,955.88
  6. Step 6: Final answer
    x = 19,875.37

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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.