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Finding the Fourth Proportional to 13,172.63, 18,176.95 and 7,507.69

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Solution

The fourth proportional to 13,172.63, 18,176.95 and 7,507.69 is: 10,359.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,172.63 : 18,176.95 = 7,507.69 : x
  2. Step 2: Convert to fraction form
    13,172.63/18,176.95 = 7,507.69/x
  3. Step 3: Cross multiply
    13,172.63x = 18,176.95 × 7,507.69
  4. Step 4: Simplify right side
    13,172.63x = 136,466,868.21
  5. Step 5: Solve for x
    x = 136,466,868.21/13,172.63
  6. Step 6: Final answer
    x = 10,359.88

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Double scale
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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.