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Finding the Fourth Proportional to 28,642.44, 42,948.06 and 8,915.64

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Solution

The fourth proportional to 28,642.44, 42,948.06 and 8,915.64 is: 13,368.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,642.44 : 42,948.06 = 8,915.64 : x
  2. Step 2: Convert to fraction form
    28,642.44/42,948.06 = 8,915.64/x
  3. Step 3: Cross multiply
    28,642.44x = 42,948.06 × 8,915.64
  4. Step 4: Simplify right side
    28,642.44x = 382,909,441.66
  5. Step 5: Solve for x
    x = 382,909,441.66/28,642.44
  6. Step 6: Final answer
    x = 13,368.60

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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.