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Finding the Fourth Proportional to 17,619.40, 26,429.10 and 8,871.40

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Solution

The fourth proportional to 17,619.40, 26,429.10 and 8,871.40 is: 13,307.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,619.40 : 26,429.10 = 8,871.40 : x
  2. Step 2: Convert to fraction form
    17,619.40/26,429.10 = 8,871.40/x
  3. Step 3: Cross multiply
    17,619.40x = 26,429.10 × 8,871.40
  4. Step 4: Simplify right side
    17,619.40x = 234,463,117.74
  5. Step 5: Solve for x
    x = 234,463,117.74/17,619.40
  6. Step 6: Final answer
    x = 13,307.10

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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.