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Finding the Fourth Proportional to 15,926.66, 21,978.23 and 8,756.53

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Solution

The fourth proportional to 15,926.66, 21,978.23 and 8,756.53 is: 12,083.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,926.66 : 21,978.23 = 8,756.53 : x
  2. Step 2: Convert to fraction form
    15,926.66/21,978.23 = 8,756.53/x
  3. Step 3: Cross multiply
    15,926.66x = 21,978.23 × 8,756.53
  4. Step 4: Simplify right side
    15,926.66x = 192,452,997.29
  5. Step 5: Solve for x
    x = 192,452,997.29/15,926.66
  6. Step 6: Final answer
    x = 12,083.70

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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.