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Finding the Fourth Proportional to 39,536, 54,572.64 and 28,390.40

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Solution

The fourth proportional to 39,536, 54,572.64 and 28,390.40 is: 39,188.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,536 : 54,572.64 = 28,390.40 : x
  2. Step 2: Convert to fraction form
    39,536/54,572.64 = 28,390.40/x
  3. Step 3: Cross multiply
    39,536x = 54,572.64 × 28,390.40
  4. Step 4: Simplify right side
    39,536x = 1,549,339,078.66
  5. Step 5: Solve for x
    x = 1,549,339,078.66/39,536
  6. Step 6: Final answer
    x = 39,188.06

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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.