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Finding the Fourth Proportional to 28,992.09, 40,009.09 and 17,661.59

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Solution

The fourth proportional to 28,992.09, 40,009.09 and 17,661.59 is: 24,372.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,992.09 : 40,009.09 = 17,661.59 : x
  2. Step 2: Convert to fraction form
    28,992.09/40,009.09 = 17,661.59/x
  3. Step 3: Cross multiply
    28,992.09x = 40,009.09 × 17,661.59
  4. Step 4: Simplify right side
    28,992.09x = 706,623,943.81
  5. Step 5: Solve for x
    x = 706,623,943.81/28,992.09
  6. Step 6: Final answer
    x = 24,372.99

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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.