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Finding the Fourth Proportional to 15,547.44, 21,455.04 and 8,474

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Solution

The fourth proportional to 15,547.44, 21,455.04 and 8,474 is: 11,693.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,547.44 : 21,455.04 = 8,474 : x
  2. Step 2: Convert to fraction form
    15,547.44/21,455.04 = 8,474/x
  3. Step 3: Cross multiply
    15,547.44x = 21,455.04 × 8,474
  4. Step 4: Simplify right side
    15,547.44x = 181,810,008.96
  5. Step 5: Solve for x
    x = 181,810,008.96/15,547.44
  6. Step 6: Final answer
    x = 11,693.89

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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.