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Finding the Fourth Proportional to 12,661.21, 17,472.45 and 7,359.22

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Solution

The fourth proportional to 12,661.21, 17,472.45 and 7,359.22 is: 10,155.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,661.21 : 17,472.45 = 7,359.22 : x
  2. Step 2: Convert to fraction form
    12,661.21/17,472.45 = 7,359.22/x
  3. Step 3: Cross multiply
    12,661.21x = 17,472.45 × 7,359.22
  4. Step 4: Simplify right side
    12,661.21x = 128,583,603.49
  5. Step 5: Solve for x
    x = 128,583,603.49/12,661.21
  6. Step 6: Final answer
    x = 10,155.71

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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.