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Finding the Fourth Proportional to 28,623.15, 39,498.03 and 15,875.82

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Solution

The fourth proportional to 28,623.15, 39,498.03 and 15,875.82 is: 21,907.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,623.15 : 39,498.03 = 15,875.82 : x
  2. Step 2: Convert to fraction form
    28,623.15/39,498.03 = 15,875.82/x
  3. Step 3: Cross multiply
    28,623.15x = 39,498.03 × 15,875.82
  4. Step 4: Simplify right side
    28,623.15x = 627,063,614.63
  5. Step 5: Solve for x
    x = 627,063,614.63/28,623.15
  6. Step 6: Final answer
    x = 21,907.57

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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.