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Finding the Fourth Proportional to 28,973.40, 39,978.06 and 17,039.22

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Solution

The fourth proportional to 28,973.40, 39,978.06 and 17,039.22 is: 23,511.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,973.40 : 39,978.06 = 17,039.22 : x
  2. Step 2: Convert to fraction form
    28,973.40/39,978.06 = 17,039.22/x
  3. Step 3: Cross multiply
    28,973.40x = 39,978.06 × 17,039.22
  4. Step 4: Simplify right side
    28,973.40x = 681,194,959.51
  5. Step 5: Solve for x
    x = 681,194,959.51/28,973.40
  6. Step 6: Final answer
    x = 23,511.05

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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.