Home / 12,939.02-17,857.79-7,906.16

Finding the Fourth Proportional to 12,939.02, 17,857.79 and 7,906.16

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Solution

The fourth proportional to 12,939.02, 17,857.79 and 7,906.16 is: 10,911.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.02 : 17,857.79 = 7,906.16 : x
  2. Step 2: Convert to fraction form
    12,939.02/17,857.79 = 7,906.16/x
  3. Step 3: Cross multiply
    12,939.02x = 17,857.79 × 7,906.16
  4. Step 4: Simplify right side
    12,939.02x = 141,186,416.17
  5. Step 5: Solve for x
    x = 141,186,416.17/12,939.02
  6. Step 6: Final answer
    x = 10,911.68

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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.