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Finding the Fourth Proportional to 28,978.43, 39,988.04 and 17,646.67

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Solution

The fourth proportional to 28,978.43, 39,988.04 and 17,646.67 is: 24,351.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.43 : 39,988.04 = 17,646.67 : x
  2. Step 2: Convert to fraction form
    28,978.43/39,988.04 = 17,646.67/x
  3. Step 3: Cross multiply
    28,978.43x = 39,988.04 × 17,646.67
  4. Step 4: Simplify right side
    28,978.43x = 705,655,745.83
  5. Step 5: Solve for x
    x = 705,655,745.83/28,978.43
  6. Step 6: Final answer
    x = 24,351.07

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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.