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Finding the Fourth Proportional to 39,170.40, 58,712.40 and 21,652.80

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Solution

The fourth proportional to 39,170.40, 58,712.40 and 21,652.80 is: 32,455.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,170.40 : 58,712.40 = 21,652.80 : x
  2. Step 2: Convert to fraction form
    39,170.40/58,712.40 = 21,652.80/x
  3. Step 3: Cross multiply
    39,170.40x = 58,712.40 × 21,652.80
  4. Step 4: Simplify right side
    39,170.40x = 1,271,287,854.72
  5. Step 5: Solve for x
    x = 1,271,287,854.72/39,170.40
  6. Step 6: Final answer
    x = 32,455.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.