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Finding the Fourth Proportional to 13,753.31, 18,978.51 and 8,088.29

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Solution

The fourth proportional to 13,753.31, 18,978.51 and 8,088.29 is: 11,161.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,753.31 : 18,978.51 = 8,088.29 : x
  2. Step 2: Convert to fraction form
    13,753.31/18,978.51 = 8,088.29/x
  3. Step 3: Cross multiply
    13,753.31x = 18,978.51 × 8,088.29
  4. Step 4: Simplify right side
    13,753.31x = 153,503,692.65
  5. Step 5: Solve for x
    x = 153,503,692.65/13,753.31
  6. Step 6: Final answer
    x = 11,161.22

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1.5x scale

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.