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Finding the Fourth Proportional to 14,490, 21,699.55 and 13,087.57

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Solution

The fourth proportional to 14,490, 21,699.55 and 13,087.57 is: 19,599.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,490 : 21,699.55 = 13,087.57 : x
  2. Step 2: Convert to fraction form
    14,490/21,699.55 = 13,087.57/x
  3. Step 3: Cross multiply
    14,490x = 21,699.55 × 13,087.57
  4. Step 4: Simplify right side
    14,490x = 283,994,379.59
  5. Step 5: Solve for x
    x = 283,994,379.59/14,490
  6. Step 6: Final answer
    x = 19,599.34

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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.