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Finding the Fourth Proportional to 10,999.80, 15,179.70 and 6,525.72

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Solution

The fourth proportional to 10,999.80, 15,179.70 and 6,525.72 is: 9,005.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.80 : 15,179.70 = 6,525.72 : x
  2. Step 2: Convert to fraction form
    10,999.80/15,179.70 = 6,525.72/x
  3. Step 3: Cross multiply
    10,999.80x = 15,179.70 × 6,525.72
  4. Step 4: Simplify right side
    10,999.80x = 99,058,471.88
  5. Step 5: Solve for x
    x = 99,058,471.88/10,999.80
  6. Step 6: Final answer
    x = 9,005.48

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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.