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Finding the Fourth Proportional to 39,915.60, 59,815.80 and 17,710.80

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Solution

The fourth proportional to 39,915.60, 59,815.80 and 17,710.80 is: 26,540.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,915.60 : 59,815.80 = 17,710.80 : x
  2. Step 2: Convert to fraction form
    39,915.60/59,815.80 = 17,710.80/x
  3. Step 3: Cross multiply
    39,915.60x = 59,815.80 × 17,710.80
  4. Step 4: Simplify right side
    39,915.60x = 1,059,385,670.64
  5. Step 5: Solve for x
    x = 1,059,385,670.64/39,915.60
  6. Step 6: Final answer
    x = 26,540.64

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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.