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Finding the Fourth Proportional to 28,967.92, 39,969.20 and 17,643.28

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Solution

The fourth proportional to 28,967.92, 39,969.20 and 17,643.28 is: 24,343.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,967.92 : 39,969.20 = 17,643.28 : x
  2. Step 2: Convert to fraction form
    28,967.92/39,969.20 = 17,643.28/x
  3. Step 3: Cross multiply
    28,967.92x = 39,969.20 × 17,643.28
  4. Step 4: Simplify right side
    28,967.92x = 705,187,786.98
  5. Step 5: Solve for x
    x = 705,187,786.98/28,967.92
  6. Step 6: Final answer
    x = 24,343.75

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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.