Home / 12,490-17,236.26-7,185.13

Finding the Fourth Proportional to 12,490, 17,236.26 and 7,185.13

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Solution

The fourth proportional to 12,490, 17,236.26 and 7,185.13 is: 9,915.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490 : 17,236.26 = 7,185.13 : x
  2. Step 2: Convert to fraction form
    12,490/17,236.26 = 7,185.13/x
  3. Step 3: Cross multiply
    12,490x = 17,236.26 × 7,185.13
  4. Step 4: Simplify right side
    12,490x = 123,844,768.81
  5. Step 5: Solve for x
    x = 123,844,768.81/12,490
  6. Step 6: Final answer
    x = 9,915.51

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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.