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Finding the Fourth Proportional to 12,988.26, 19,491.02 and 4,780.26

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Solution

The fourth proportional to 12,988.26, 19,491.02 and 4,780.26 is: 7,173.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.26 : 19,491.02 = 4,780.26 : x
  2. Step 2: Convert to fraction form
    12,988.26/19,491.02 = 4,780.26/x
  3. Step 3: Cross multiply
    12,988.26x = 19,491.02 × 4,780.26
  4. Step 4: Simplify right side
    12,988.26x = 93,172,143.27
  5. Step 5: Solve for x
    x = 93,172,143.27/12,988.26
  6. Step 6: Final answer
    x = 7,173.57

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1.5x scale

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.