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Finding the Fourth Proportional to 28,883.63, 39,859.71 and 16,947.17

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Solution

The fourth proportional to 28,883.63, 39,859.71 and 16,947.17 is: 23,387.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,883.63 : 39,859.71 = 16,947.17 : x
  2. Step 2: Convert to fraction form
    28,883.63/39,859.71 = 16,947.17/x
  3. Step 3: Cross multiply
    28,883.63x = 39,859.71 × 16,947.17
  4. Step 4: Simplify right side
    28,883.63x = 675,509,082.22
  5. Step 5: Solve for x
    x = 675,509,082.22/28,883.63
  6. Step 6: Final answer
    x = 23,387.27

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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.