Home / 12,549.78-17,318.53-7,172.16

Finding the Fourth Proportional to 12,549.78, 17,318.53 and 7,172.16

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Solution

The fourth proportional to 12,549.78, 17,318.53 and 7,172.16 is: 9,897.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,549.78 : 17,318.53 = 7,172.16 : x
  2. Step 2: Convert to fraction form
    12,549.78/17,318.53 = 7,172.16/x
  3. Step 3: Cross multiply
    12,549.78x = 17,318.53 × 7,172.16
  4. Step 4: Simplify right side
    12,549.78x = 124,211,208.43
  5. Step 5: Solve for x
    x = 124,211,208.43/12,549.78
  6. Step 6: Final answer
    x = 9,897.48

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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.