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Finding the Fourth Proportional to 18,955.84, 28,410 and 14,589.76

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Solution

The fourth proportional to 18,955.84, 28,410 and 14,589.76 is: 21,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.84 : 28,410 = 14,589.76 : x
  2. Step 2: Convert to fraction form
    18,955.84/28,410 = 14,589.76/x
  3. Step 3: Cross multiply
    18,955.84x = 28,410 × 14,589.76
  4. Step 4: Simplify right side
    18,955.84x = 414,495,081.60
  5. Step 5: Solve for x
    x = 414,495,081.60/18,955.84
  6. Step 6: Final answer
    x = 21,866.35

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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.