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Finding the Fourth Proportional to 15,311.66, 21,128.48 and 8,598.02

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Solution

The fourth proportional to 15,311.66, 21,128.48 and 8,598.02 is: 11,864.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.66 : 21,128.48 = 8,598.02 : x
  2. Step 2: Convert to fraction form
    15,311.66/21,128.48 = 8,598.02/x
  3. Step 3: Cross multiply
    15,311.66x = 21,128.48 × 8,598.02
  4. Step 4: Simplify right side
    15,311.66x = 181,663,093.61
  5. Step 5: Solve for x
    x = 181,663,093.61/15,311.66
  6. Step 6: Final answer
    x = 11,864.36

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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.