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Finding the Fourth Proportional to 12,491.52, 17,237.52 and 10,988.16

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Solution

The fourth proportional to 12,491.52, 17,237.52 and 10,988.16 is: 15,162.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.52 : 17,237.52 = 10,988.16 : x
  2. Step 2: Convert to fraction form
    12,491.52/17,237.52 = 10,988.16/x
  3. Step 3: Cross multiply
    12,491.52x = 17,237.52 × 10,988.16
  4. Step 4: Simplify right side
    12,491.52x = 189,408,627.76
  5. Step 5: Solve for x
    x = 189,408,627.76/12,491.52
  6. Step 6: Final answer
    x = 15,162.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.