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Finding the Fourth Proportional to 32,915.10, 45,411 and 18,759.78

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Solution

The fourth proportional to 32,915.10, 45,411 and 18,759.78 is: 25,881.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,915.10 : 45,411 = 18,759.78 : x
  2. Step 2: Convert to fraction form
    32,915.10/45,411 = 18,759.78/x
  3. Step 3: Cross multiply
    32,915.10x = 45,411 × 18,759.78
  4. Step 4: Simplify right side
    32,915.10x = 851,900,369.58
  5. Step 5: Solve for x
    x = 851,900,369.58/32,915.10
  6. Step 6: Final answer
    x = 25,881.75

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1.5x scale

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.