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Finding the Fourth Proportional to 15,090.93, 20,822.16 and 8,716.17

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Solution

The fourth proportional to 15,090.93, 20,822.16 and 8,716.17 is: 12,026.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.93 : 20,822.16 = 8,716.17 : x
  2. Step 2: Convert to fraction form
    15,090.93/20,822.16 = 8,716.17/x
  3. Step 3: Cross multiply
    15,090.93x = 20,822.16 × 8,716.17
  4. Step 4: Simplify right side
    15,090.93x = 181,489,486.33
  5. Step 5: Solve for x
    x = 181,489,486.33/15,090.93
  6. Step 6: Final answer
    x = 12,026.40

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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.