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Finding the Fourth Proportional to 28,963.80, 39,973.41 and 17,639.93

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Solution

The fourth proportional to 28,963.80, 39,973.41 and 17,639.93 is: 24,345.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,963.80 : 39,973.41 = 17,639.93 : x
  2. Step 2: Convert to fraction form
    28,963.80/39,973.41 = 17,639.93/x
  3. Step 3: Cross multiply
    28,963.80x = 39,973.41 × 17,639.93
  4. Step 4: Simplify right side
    28,963.80x = 705,127,866.19
  5. Step 5: Solve for x
    x = 705,127,866.19/28,963.80
  6. Step 6: Final answer
    x = 24,345.15

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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.