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Finding the Fourth Proportional to 28,614.76, 42,915.90 and 14,559.88

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Solution

The fourth proportional to 28,614.76, 42,915.90 and 14,559.88 is: 21,836.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,614.76 : 42,915.90 = 14,559.88 : x
  2. Step 2: Convert to fraction form
    28,614.76/42,915.90 = 14,559.88/x
  3. Step 3: Cross multiply
    28,614.76x = 42,915.90 × 14,559.88
  4. Step 4: Simplify right side
    28,614.76x = 624,850,354.09
  5. Step 5: Solve for x
    x = 624,850,354.09/28,614.76
  6. Step 6: Final answer
    x = 21,836.64

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1.5x scale

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.