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Finding the Fourth Proportional to 28,357.65, 42,538.43 and 9,630.04

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Solution

The fourth proportional to 28,357.65, 42,538.43 and 9,630.04 is: 14,445.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.65 : 42,538.43 = 9,630.04 : x
  2. Step 2: Convert to fraction form
    28,357.65/42,538.43 = 9,630.04/x
  3. Step 3: Cross multiply
    28,357.65x = 42,538.43 × 9,630.04
  4. Step 4: Simplify right side
    28,357.65x = 409,646,782.44
  5. Step 5: Solve for x
    x = 409,646,782.44/28,357.65
  6. Step 6: Final answer
    x = 14,445.72

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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.