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Finding the Fourth Proportional to 14,478.51, 21,720.95 and 8,241.46

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Solution

The fourth proportional to 14,478.51, 21,720.95 and 8,241.46 is: 12,364.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,478.51 : 21,720.95 = 8,241.46 : x
  2. Step 2: Convert to fraction form
    14,478.51/21,720.95 = 8,241.46/x
  3. Step 3: Cross multiply
    14,478.51x = 21,720.95 × 8,241.46
  4. Step 4: Simplify right side
    14,478.51x = 179,012,340.59
  5. Step 5: Solve for x
    x = 179,012,340.59/14,478.51
  6. Step 6: Final answer
    x = 12,364.00

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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.