Home / 10,999.70-15,175.60-7,224.91

Finding the Fourth Proportional to 10,999.70, 15,175.60 and 7,224.91

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Solution

The fourth proportional to 10,999.70, 15,175.60 and 7,224.91 is: 9,967.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.70 : 15,175.60 = 7,224.91 : x
  2. Step 2: Convert to fraction form
    10,999.70/15,175.60 = 7,224.91/x
  3. Step 3: Cross multiply
    10,999.70x = 15,175.60 × 7,224.91
  4. Step 4: Simplify right side
    10,999.70x = 109,642,288.19
  5. Step 5: Solve for x
    x = 109,642,288.19/10,999.70
  6. Step 6: Final answer
    x = 9,967.75

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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.