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Finding the Fourth Proportional to 15,847.13, 21,869.03 and 8,774.00

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Solution

The fourth proportional to 15,847.13, 21,869.03 and 8,774.00 is: 12,108.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,847.13 : 21,869.03 = 8,774.00 : x
  2. Step 2: Convert to fraction form
    15,847.13/21,869.03 = 8,774.00/x
  3. Step 3: Cross multiply
    15,847.13x = 21,869.03 × 8,774.00
  4. Step 4: Simplify right side
    15,847.13x = 191,878,945.83
  5. Step 5: Solve for x
    x = 191,878,945.83/15,847.13
  6. Step 6: Final answer
    x = 12,108.12

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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.